Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Income	Total
Beginning Balance at Dec. 31, 2021	$ 255	$ 784,356	$ 712,478	$ (827,381)	$ 14,158	$ 683,866
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting change on convertible debt		(39,239)	6,718			(32,521)
Dividends on common shares			(4,271)			(4,271)
Employee stock-based compensation		8,203				8,203
Issuance of shares of common stock under long-term incentive plan	1					1
Common stock withheld related to net share settlement of equity awards		(4,827)				(4,827)
Issuance of shares of common stock for warrants exercised		506				506
Total comprehensive income			271,872		1,423	273,295
Ending Balance at Mar. 31, 2022	256	748,999	986,797	(827,381)	15,581	924,252
Beginning Balance at Dec. 31, 2022	288	724,660	1,565,374	(986,171)	61,429	1,365,580
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares			(55,140)			(55,140)
Dividend Equivalents earned on RSU grants		120	(2,354)			(2,234)
Purchase of common stock under share repurchase program		(13)		(18,994)		(19,007)
Employee stock-based compensation		6,767				6,767
Cash paid for convertible debt repurchased		(44,486)				(44,486)
Issuance of shares of common stock under long-term incentive plan	3					3
Common stock withheld related to net share settlement of equity awards		(27,055)				(27,055)
Issuance of shares of common stock for warrants exercised	10	43,719				43,729
Total comprehensive income			198,108		(2,271)	195,837
Ending Balance at Mar. 31, 2023	$ 301	$ 703,712	$ 1,705,988	$ (1,005,165)	$ 59,158	$ 1,463,994