Long-Term Debt (Interest Expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Coupon interest | $ 3,047 | $ 3,047 | $ 9,141 | $ 8,193 |
| Amortization of debt issuance costs | 356 | 356 | 1,068 | 949 |
| Total interest expense on Notes | $ 3,403 | $ 3,403 | $ 10,209 | $ 9,142 |
| X | ||||||||||
- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|