Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in- Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings	Cumulative Effect, Period of Adoption, Adjustment	[1]	Cumulative Effect, Period of Adoption, Adjustment Retained Earnings	[1]
Beginning balance (in shares) at Dec. 31, 2019			55,702,628
Beginning balance at Dec. 31, 2019		$ (23,511)	$ 951	$ 231,160	$ (4,550)	$ (1,219,905)	$ 968,833	$ (6,831)		$ (6,831)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		55,463					55,463
Other comprehensive income (loss)		(664)			(664)
Share based payment activity (in shares)	[2]		294,826
Share based payment activity	[2]	(1,787)		(9,607)		8,089	(269)
Dividends declared	[2]	(12,452)					(12,452)
Treasury purchases (in shares)			(657,031)
Treasury purchases		(54,072)				(54,072)
Ending balance (in shares) at Mar. 31, 2020			55,340,423
Ending balance at Mar. 31, 2020		$ (43,854)	$ 951	221,553	(5,214)	(1,265,888)	1,004,744
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share (in dollars per share)		$ 0.225
Beginning balance (in shares) at Dec. 31, 2020		55,535,554	55,535,554
Beginning balance at Dec. 31, 2020		$ (5,752)	$ 951	233,921	(4,646)	(1,260,478)	1,024,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		22,337					22,337
Other comprehensive income (loss)		52			52
Share based payment activity (in shares)	[2]		48,781
Share based payment activity	[2]	7,644		3,617		4,030	(3)
Dividends declared	[2]	$ 0					0
Treasury purchases (in shares)		0	(46,499)
Treasury purchases		$ (5,046)				(5,046)
Ending balance (in shares) at Mar. 31, 2021		55,537,836	55,537,836
Ending balance at Mar. 31, 2021		$ 19,235	$ 951	$ 237,538	$ (4,594)	$ (1,261,494)	$ 1,046,834
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share (in dollars per share)		$ 0

[1] Reflects the cumulative effect of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) and subsequent amendments issued thereafter (collectively "Topic 326"), which was adopted on January 1, 2020. Refer to Note 3.

[2] During the fourth quarter of 2019, the Company's board of directors announced a 5% increase to the quarterly dividend rate to $0.225 per share from $0.215 per share, beginning with the dividend payable in the first quarter of 2020. On February 28, 2020, the Company’s board of directors declared a quarterly cash dividend of $0.225 per share of common stock. The dividend was payable on April 16, 2020 to shareholders of record on April 2, 2020. In April 2020, subsequent to the payment of the dividend and in light of uncertainty resulting from the COVID-19 pandemic, we suspended future, undeclared dividends. During 2020 and 2021, accumulated dividends were paid to certain shareholders upon vesting of certain performance vested restricted stock units ("PVRSU") which are captured in Share based payment activity. On May 7, 2021, the Company's board of directors declared a quarterly cash dividend of $0.225 per share of common stock. Refer to Note 14.