Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in- Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2018			55,679,207
Beginning balance at Dec. 31, 2018		$ (183,772)	$ 951	$ 213,170	$ (5,446)	$ (1,187,625)	$ 795,178
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		30,081					30,081
Other comprehensive income (loss)		8			8
Other	[1]	(614)					(614)
Share based payment activity (in shares)			408,545
Share based payment activity		12,920		3,214		9,706
Dividends declared ($0.215 per share)		$ (12,149)					(12,149)
Treasury purchases (in shares)		(548,031)	(414,077)
Treasury purchases		$ (31,951)				(31,951)
Ending balance (in shares) at Mar. 31, 2019			55,673,675
Ending balance at Mar. 31, 2019		$ (185,477)	$ 951	216,384	(5,438)	(1,209,870)	812,496
Beginning balance (in shares) at Dec. 31, 2019		55,702,628	55,702,628
Beginning balance at Dec. 31, 2019		$ (23,511)	$ 951	231,160	(4,550)	(1,219,905)	968,833
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)			294,826
Share based payment activity		(1,518)		(9,607)		8,089
Dividends declared ($0.215 per share)	[2]	(12,721)					(12,721)
Treasury purchases (in shares)			(657,031)
Treasury purchases		$ (54,072)				(54,072)
Ending balance (in shares) at Mar. 31, 2020		55,340,423	55,340,423
Ending balance at Mar. 31, 2020		$ (43,854)	$ 951	$ 221,553	$ (5,214)	$ (1,265,888)	$ 1,004,744

[1] Impact of adoption of Financial Accounting Standards Board ("FASB") Accounting Standards Update (“ASU”) No. 2014-09, Revenue From Contracts with Customers (Topic 606) and subsequent amendments to the initial guidance ("Topic 606") related to a foreign joint venture accounted for as an equity method investment.

[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 light of uncertainty resulting from the COVID-19 pandemic, we have taken the action to suspend future, undeclared dividends for at least the remainder of 2020. Reference Management's Discussion and Analysis of Financial Condition and Results of Operations.