UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock	Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Equity, beginning balance at Dec. 31, 2019	$ 906,827	$ 0	$ 18	$ (2,403)	$ 1,008,362	$ (91,955)	$ (7,195)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock and related tax withholdings	(549)				(549)
Stock-based incentive compensation	757				757
Net loss	(19,910)					(19,910)
Other comprehensive income (loss)	(16,632)						(16,632)
Equity, ending balance at Mar. 31, 2020	870,493	0	18	(2,403)	1,008,570	(111,865)	(23,827)
Equity, beginning balance at Dec. 31, 2020	1,015,724	0	18	(2,403)	1,129,312	(100,031)	(11,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock and related tax withholdings	(69)				(69)
Stock-based incentive compensation	1,205				1,205
Net loss	(2,861)					(2,861)
Other comprehensive income (loss)	4,081						4,081
Equity, ending balance at Mar. 31, 2021	$ 1,018,080	$ 0	$ 18	$ (2,403)	$ 1,130,448	$ (102,892)	$ (7,091)