Quarterly report pursuant to Section 13 or 15(d)

Note 15 - Segment Information - Summary of Reportable Segments (Details)

v3.10.0.1
Note 15 - Segment Information - Summary of Reportable Segments (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Average Rates Per Day $ 7,323 $ 6,006 $ 7,229 $ 5,806  
Fleet Utilization 68.00% 60.00% 61.00% 54.00%  
Fleet Available Days 12,617 12,580 37,746 36,709  
Operating Revenues $ 70,255 $ 47,813 $ 182,677 $ 124,440  
Direct Costs and Expenses 48,598 38,422 132,926 109,002  
Direct Vessel Profit 21,657 9,391 49,751 15,438  
Operating expenses 32,401 28,776 104,323 96,724  
Administrative and general 12,234 10,318 40,573 43,849  
Depreciation and amortization 17,342 15,622 55,260 42,758  
Gains (Losses) on Asset Dispositions and Impairments, Net 586 (9,744) (1,002) (11,243)  
Operating Loss (10,158) (29,129) (55,574) (92,529)  
Historical cost 1,279,000 1,204,409 1,279,000 1,204,409 $ 1,179,836
Accumulated depreciation (568,752) (558,919) (568,752) (558,919) (560,160)
710,248 645,490 710,248 645,490 $ 619,676
Leased-in Equipment [Member]          
Operating expenses 2,825 2,836 8,490 10,117  
Time Charter [Member]          
Operating Revenues 62,902 45,267 166,870 114,800  
Bareboat Charter [Member]          
Operating Revenues 1,168 1,168 3,467 3,467  
Other Marine Services [Member]          
Operating Revenues 6,185 1,378 12,340 6,173  
Personnel [Member]          
Direct Costs and Expenses 25,021 22,179 71,430 59,547  
Repairs and Maintenance [Member]          
Direct Costs and Expenses 9,208 7,410 25,351 21,430  
Drydocking [Member]          
Direct Costs and Expenses 4,822 2,279 10,191 7,597  
Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 1,857 1,396 4,981 5,081  
Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 4,690 2,880 12,357 8,412  
Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses 3,000 2,278 8,616 6,935  
UNITED STATES          
Average Rates Per Day $ 12,476 $ 7,212 $ 10,832 $ 8,661  
Fleet Utilization 30.00% 16.00% 23.00% 12.00%  
Fleet Available Days 3,433 3,859 11,193 11,920  
Operating Revenues $ 15,522 $ 5,703 $ 33,887 $ 15,611  
Direct Costs and Expenses 8,915 7,823 23,984 20,681  
Direct Vessel Profit 6,607 (2,120) 9,903 (5,070)  
Administrative and general  
Depreciation and amortization 5,227 5,224 17,677 16,573  
Historical cost 479,303 429,500 479,303 429,500  
Accumulated depreciation (242,364) (237,210) (242,364) (237,210)  
236,939 192,290 236,939 192,290  
UNITED STATES | Leased-in Equipment [Member]          
Operating expenses 1,853 1,870 5,571 6,286  
UNITED STATES | Time Charter [Member]          
Operating Revenues 12,800 4,587 27,834 12,471  
UNITED STATES | Bareboat Charter [Member]          
Operating Revenues  
UNITED STATES | Other Marine Services [Member]          
Operating Revenues 2,722 1,116 6,053 3,140  
UNITED STATES | Personnel [Member]          
Direct Costs and Expenses 4,853 4,455 13,481 11,768  
UNITED STATES | Repairs and Maintenance [Member]          
Direct Costs and Expenses 1,801 1,289 4,024 2,963  
UNITED STATES | Drydocking [Member]          
Direct Costs and Expenses 375 1,109 1,810 1,992  
UNITED STATES | Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 612 598 1,948 2,608  
UNITED STATES | Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 1,120 249 2,513 1,104  
UNITED STATES | Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses 154 123 208 246  
Africa [Member]          
Average Rates Per Day $ 9,315 $ 10,611 $ 9,425 $ 10,192  
Fleet Utilization 82.00% 71.00% 86.00% 67.00%  
Fleet Available Days 1,475 1,283 4,066 3,425  
Operating Revenues $ 12,978 $ 9,390 $ 36,531 $ 23,430  
Direct Costs and Expenses 10,632 6,777 27,423 21,650  
Direct Vessel Profit 2,346 2,613 9,108 1,780  
Administrative and general  
Depreciation and amortization 2,381 2,456 8,112 6,105  
Historical cost 186,729 189,845 186,729 189,845  
Accumulated depreciation (53,498) (54,052) (53,498) (54,052)  
133,231 135,793 133,231 135,793  
Africa [Member] | Leased-in Equipment [Member]          
Operating expenses 960 966 2,885 2,905  
Africa [Member] | Time Charter [Member]          
Operating Revenues 11,201 9,700 33,117 23,333  
Africa [Member] | Bareboat Charter [Member]          
Operating Revenues  
Africa [Member] | Other Marine Services [Member]          
Operating Revenues 1,777 (310) 3,414 97  
Africa [Member] | Personnel [Member]          
Direct Costs and Expenses 4,486 3,588 12,873 9,624  
Africa [Member] | Repairs and Maintenance [Member]          
Direct Costs and Expenses 2,438 1,324 5,457 5,102  
Africa [Member] | Drydocking [Member]          
Direct Costs and Expenses 1,201 311 2,113 2,051  
Africa [Member] | Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 323 157 789 696  
Africa [Member] | Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 1,081 693 2,650 1,956  
Africa [Member] | Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses 1,103 704 3,541 2,221  
Middle East and Asia [Member]          
Average Rates Per Day $ 8,156 $ 7,138 $ 8,156 $ 6,916  
Fleet Utilization 76.00% 61.00% 75.00% 55.00%  
Fleet Available Days 2,024 2,194 6,161 5,970  
Operating Revenues $ 12,507 $ 9,149 $ 36,550 $ 23,373  
Direct Costs and Expenses 9,033 9,608 27,786 26,574  
Direct Vessel Profit 3,474 (459) 8,764 (3,201)  
Administrative and general  
Depreciation and amortization 4,207 4,320 14,608 10,826  
Historical cost 310,110 328,263 310,110 328,263  
Accumulated depreciation (81,121) (93,535) (81,121) (93,535)  
228,989 234,728 228,989 234,728  
Middle East and Asia [Member] | Leased-in Equipment [Member]          
Operating expenses 862  
Middle East and Asia [Member] | Time Charter [Member]          
Operating Revenues 12,590 9,490 37,555 22,728  
Middle East and Asia [Member] | Bareboat Charter [Member]          
Operating Revenues  
Middle East and Asia [Member] | Other Marine Services [Member]          
Operating Revenues (83) (341) (1,005) 645  
Middle East and Asia [Member] | Personnel [Member]          
Direct Costs and Expenses 4,361 4,731 12,452 12,001  
Middle East and Asia [Member] | Repairs and Maintenance [Member]          
Direct Costs and Expenses 2,091 2,309 8,095 6,832  
Middle East and Asia [Member] | Drydocking [Member]          
Direct Costs and Expenses 352   413 414  
Direct Costs and Expenses   (102)      
Middle East and Asia [Member] | Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 385 363 982 1,062  
Middle East and Asia [Member] | Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 892 1,115 2,848 2,547  
Middle East and Asia [Member] | Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses 952 1,192 2,996 3,718  
Brazil, Mexico, Central and South America [Member]          
Average Rates Per Day $ 17,604 $ 16,060 $ 17,807 $ 16,060  
Fleet Utilization 80.00% 49.00% 65.00% 24.00%  
Fleet Available Days 531 184 1,166 379  
Operating Revenues $ 9,063 $ 2,766 $ 18,247 $ 5,302  
Direct Costs and Expenses 3,017 613 6,158 936  
Direct Vessel Profit 6,046 2,153 12,089 4,366  
Administrative and general  
Depreciation and amortization 2,521 1,025 6,020 2,474  
Historical cost 102,776 78,976 102,776 78,976  
Accumulated depreciation (47,374) (42,590) (47,374) (42,590)  
55,402 36,386 55,402 36,386  
Brazil, Mexico, Central and South America [Member] | Leased-in Equipment [Member]          
Operating expenses  
Brazil, Mexico, Central and South America [Member] | Time Charter [Member]          
Operating Revenues 7,479 1,439 13,409 1,439  
Brazil, Mexico, Central and South America [Member] | Bareboat Charter [Member]          
Operating Revenues 1,168 1,168 3,467 3,467  
Brazil, Mexico, Central and South America [Member] | Other Marine Services [Member]          
Operating Revenues 416 159 1,371 396  
Brazil, Mexico, Central and South America [Member] | Personnel [Member]          
Direct Costs and Expenses 1,662 326 3,257 487  
Brazil, Mexico, Central and South America [Member] | Repairs and Maintenance [Member]          
Direct Costs and Expenses 312 110 649 230  
Brazil, Mexico, Central and South America [Member] | Drydocking [Member]          
Direct Costs and Expenses 103 114  
Brazil, Mexico, Central and South America [Member] | Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 163 75 399 86  
Brazil, Mexico, Central and South America [Member] | Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 427 33 841 60  
Brazil, Mexico, Central and South America [Member] | Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses 350 69 898 73  
Europe [Member]          
Average Rates Per Day $ 4,287 $ 4,390 $ 4,721 $ 4,328  
Fleet Utilization 85.00% 90.00% 77.00% 84.00%  
Fleet Available Days 5,154 5,060 15,159 15,015  
Operating Revenues $ 20,185 $ 20,805 $ 57,462 $ 56,724  
Direct Costs and Expenses 17,001 13,601 47,575 39,161  
Direct Vessel Profit 3,184 7,204 9,887 17,563  
Administrative and general  
Depreciation and amortization 3,006 2,597 8,843 6,780  
Historical cost 200,082 177,825 200,082 177,825  
Accumulated depreciation (144,395) (131,532) (144,395) (131,532)  
55,687 46,293 55,687 46,293  
Europe [Member] | Leased-in Equipment [Member]          
Operating expenses 12 34 64  
Europe [Member] | Time Charter [Member]          
Operating Revenues 18,832 20,051 54,955 54,829  
Europe [Member] | Bareboat Charter [Member]          
Operating Revenues  
Europe [Member] | Other Marine Services [Member]          
Operating Revenues 1,353 754 2,507 1,895  
Europe [Member] | Personnel [Member]          
Direct Costs and Expenses 9,659 9,079 29,367 25,667  
Europe [Member] | Repairs and Maintenance [Member]          
Direct Costs and Expenses 2,566 2,378 7,126 6,303  
Europe [Member] | Drydocking [Member]          
Direct Costs and Expenses 2,791 961 5,741 3,140  
Europe [Member] | Insurance and Loss Reserves [Member]          
Direct Costs and Expenses 374 203 863 629  
Europe [Member] | Fuel, Lubes and Supplies [Member]          
Direct Costs and Expenses 1,170 790 3,505 2,745  
Europe [Member] | Other Direct Costs and Expenses [Member]          
Direct Costs and Expenses $ 441 $ 190 $ 973 $ 677