Debt and Hedging Instruments (Schedule of Future Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2020	$ 5,800
2021	284,051
2022	92,175
2023	2,270
2024	4,013
Thereafter	702
Total gross debt	389,011	$ 398,509
Debt discount on Term Loans	(1,739)	(2,669)
Less: Deferred issuance costs on Term Loans	(2,522)	(4,052)
Total debt	$ 384,750	$ 391,788