Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock, at cost	Accumulated Other Comprehensive Income	Total
Beginning Balance at Dec. 31, 2018	$ 250	$ 717,492	$ 527,666	$ (583,883)	$ 43,296	$ 704,821
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares			(8,111)			(8,111)
Total comprehensive income			72,741		3,094	75,835
Employee stock-based compensation		5,651				5,651
Purchase of common stock under share repurchase program				(78,249)		(78,249)
Ending Balance at Mar. 31, 2019	250	723,143	592,296	(662,132)	46,390	699,947
Beginning Balance at Dec. 31, 2019	252	730,551	731,425	(827,381)	5,689	640,536
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares			(7,834)			(7,834)
Total comprehensive income			(25,299)		(17,403)	(42,702)
Employee stock-based compensation		3,962				3,962
Common stock withheld related to net share settlement of equity awards		(198)				(198)
Ending Balance at Mar. 31, 2020	$ 252	$ 734,315	$ 698,292	$ (827,381)	$ (11,714)	$ 593,764