Long-Term Debt Schedule of Debt (Details) - USD ($) $ in Thousands |
Mar. 31, 2018 |
Feb. 16, 2018 |
Dec. 31, 2017 |
---|---|---|---|
Debt Instrument [Line Items] | |||
Total carrying value of debt | $ 111,838 | $ 267 | |
Less: current maturities | (114) | (111) | |
Long-term debt, less current portion | 111,724 | 156 | |
Senior Notes [Member] | |||
Debt Instrument [Line Items] | |||
Less: debt discount and issuance costs, net | (32,232) | 0 | |
Total carrying value of debt | 111,518 | 0 | |
Equity component of exchangeable notes, net of issuance costs | 26,699 | 0 | |
Other Long-Term Debt [Member] | |||
Debt Instrument [Line Items] | |||
Long-term debt | 320 | 267 | |
4.50% Exchangeable Senior Notes Due 2023 [Member] | |||
Debt Instrument [Line Items] | |||
Less: debt discount and issuance costs, net | $ 6,190 | ||
Debt instrument, interest rate, stated percentage | 4.50% | 4.50% | |
4.50% Exchangeable Senior Notes Due 2023 [Member] | Senior Notes [Member] | |||
Debt Instrument [Line Items] | |||
Long-term debt | $ 143,750 | $ 0 |