Income Taxes - Components of Income Tax Benefit (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							11 Months Ended	12 Months Ended
	Feb. 09, 2018	Mar. 31, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ (112)									$ (3,430)	$ 2,757
State and local	70									(1,647)	(2,315)
Current income tax expense (benefit)	(42)									(5,077)	442
Deferred
Federal	83									3,193	(4,215)
State and local	(59)									(767)	416
Deferred income tax expense (benefit)	24									2,426	(3,799)
Total income tax benefit	$ (18)	$ 189	$ (2,774)	$ (315)	$ 249	$ (5,384)	$ 455	$ 1,694	$ (122)	$ (2,651)	$ (3,357)