Loss Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator (both basic and diluted):
Loss from continuing operations	$ (29,153)	$ (24,777)	$ (205,308)	$ (58,879)
Loss from discontinued operations, net of tax	(2,926)	(14,100)	(16,250)	(35,251)
Net loss available to common stockholders, basic	(32,079)	(38,877)	(221,558)	(94,130)
Net loss available to common stockholders, diluted	$ (32,079)	$ (38,877)	$ (221,558)	$ (94,130)
Denominator:
Denominator for basic and diluted earnings per share (in shares)	24,927,369	25,606,264	24,932,900	26,551,592
Basic and diluted loss per common share from continuing operations (in dollars per share)	$ (1.17)	$ (0.97)	$ (8.23)	$ (2.22)
Basic and diluted loss per common share from discontinued operations (in dollars per share)	(0.12)	(0.55)	(0.65)	(1.33)
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (1.29)	$ (1.52)	$ (8.88)	$ (3.55)