Long-Term Debt and Interest Expense - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Debt Disclosure [Abstract]
Cash payments for interest	$ 1,187	$ 1,435	$ 19,858	$ 21,863
Change in accrued interest	8,250	12	8,446	8,050
Amortization of discounts	1,656	265	3,837	789
Amortization of deferred debt costs	543	590	2,794	1,745
Commitment and other fees paid	5	9,236	27	36
Other	42	46	115	73
Interest expense - continuing operations	$ 11,683	$ 11,584	$ 35,077	$ 32,556