CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock at Cost	Retained Earnings	Cumulative effect	Cumulative effect Retained Earnings
Beginning balance at Dec. 31, 2018	$ 1,071,140	$ 202	$ 761,301	$ (23,130)	$ (70,362)	$ 403,129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,815					6,815
Other comprehensive income, net	177			177
Stock-based compensation and net issuance of common stock for share vesting	6,377		6,377
Exercise of stock options	306	1	305
Common stock reissuances, repurchases and related expenses	(4,171)				(4,171)
Ending balance at Mar. 31, 2019	1,080,644	203	767,983	(22,953)	(74,533)	409,944
Beginning balance at Dec. 31, 2019	696,122	205	775,707	(58,616)	(107,984)	86,810
Beginning balance (ASU 2016-13) at Dec. 31, 2019							$ (440)	$ (440)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(39,808)					(39,808)
Other comprehensive income, net	(4,010)			(4,010)
Stock-based compensation and net issuance of common stock for share vesting	900		900
Common stock reissuances, repurchases and related expenses	1,071				1,071
Ending balance at Mar. 31, 2020	$ 653,835	$ 205	$ 776,607	$ (62,626)	$ (106,913)	$ 46,562