Long-Term Debt - Schedule of Interest Expense Related to Long-Term Debt (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest Expense Debt [Abstract]
Contractual interest	$ 1,832	$ 1,837	$ 3,638	$ 4,394
Non-cash expense	1,068	999	2,120	2,789
Capitalized interest	(42)	(79)	(83)	(158)
Total	$ 2,858	$ 2,757	$ 5,675	$ 7,025