Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Fair Value Measurements - Estimated Fair Value (Details)

v3.10.0.1
Note 7 - Fair Value Measurements - Estimated Fair Value (Details)
$ in Thousands
Sep. 30, 2018
USD ($)
Reported Value Measurement [Member]  
Cash, cash equivalents and restricted cash $ 104,519
Investments, at cost, in 50% or less owned companies (included in other assets) 132
Long-term debt, including current portion 415,164
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]  
Cash, cash equivalents and restricted cash 104,519
Long-term debt, including current portion
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 416,888
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