Annual report pursuant to Section 13 and 15(d)

Note 10 - Fair Value Measurements - Estimated Fair Value (Details)

v3.19.1
Note 10 - Fair Value Measurements - Estimated Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Reported Value Measurement [Member]    
Cash, cash equivalents and restricted cash $ 96,852 $ 112,551
Investments, at cost, in 50% or less owned companies (included in other assets) 132 132
Long-term debt, including current portion 404,666 314,899
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash, cash equivalents and restricted cash 96,852 112,551
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash, cash equivalents and restricted cash
Investments, at cost, in 50% or less owned companies (included in other assets)
Long-term debt, including current portion 388,949 291,932
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash, cash equivalents and restricted cash
Investments, at cost, in 50% or less owned companies (included in other assets)
Long-term debt, including current portion