Long-Term Debt Long-Term Debt - Debt Issuance Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Debt Issuance Costs, Gross	$ 63	$ 3,264
Debt Issuance Costs, Net	3,010	3,287	$ 549
Amortization of Debt Issuance Costs	$ (340)	$ (526)

Amount of amortization expense attributable to debt issuance costs.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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