Debt Components (Details) - USD ($) $ in Thousands |
Mar. 31, 2018 |
Dec. 31, 2017 |
Mar. 31, 2017 |
---|---|---|---|
Debt Instrument [Line Items] | |||
Total Debt | $ 1,128,206 | $ 1,061,071 | |
Less: current portion | (6,129) | $ (5,766) | (5,766) |
Long-term debt | 1,122,077 | $ 1,055,305 | 1,055,305 |
Senior unsecured notes [Member] | |||
Debt Instrument [Line Items] | |||
Total Debt | 425,211 | 414,862 | |
Term Debt [Member] | |||
Debt Instrument [Line Items] | |||
Total Debt | 596,899 | 615,095 | |
Revolving credit facilities and other [Member] | |||
Debt Instrument [Line Items] | |||
Total Debt | $ 106,096 | $ 31,114 |