Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Treasury Stock, at cost	Retained Earnings	Accumulated Other Comprehensive Income	Total
Beginning Balance at Dec. 31, 2020	$ 253	$ 767,484	$ (827,381)	$ 378,906	$ (35,701)	$ 283,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares				(4,001)		(4,001)
Issuance of shares of common stock under long-term incentive plan	2					2
Employee stock-based compensation		20,539				20,539
Common stock withheld related to net share settlement of equity awards		(4,842)				(4,842)
Warrants exercised		1,175				1,175
Total comprehensive income (loss)				337,573	49,859	387,432
Ending Balance at Dec. 31, 2021	255	784,356	(827,381)	712,478	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				(456,459)		(456,459)
Dividend Equivalents earned on RSU grants		826		(28,277)		(27,451)
Purchase of common stock under share repurchase program			(158,790)			(158,790)
Cash paid for convertible debt repurchased		(61,124)				(61,124)
Issuance of shares of common stock under long-term incentive plan	1					1
Employee stock-based compensation		27,383				27,383
Issuance of shares of common stock for convertible debt exchanged	26	(32)				(6)
Common stock withheld related to net share settlement of equity awards		(7,052)				(7,052)
Warrants exercised	6	19,542				19,548
Total comprehensive income (loss)				1,330,914	47,271	1,378,185
Ending Balance at Dec. 31, 2022	288	724,660	(986,171)	1,565,374	61,429	1,365,580
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares				(192,471)		(192,471)
Dividend Equivalents earned on RSU grants		428		(6,923)		(6,495)
Purchase of common stock under share repurchase program			(123,508)			(123,508)
Cash paid for convertible debt repurchased		(44,486)				(44,486)
Issuance of shares of common stock under long-term incentive plan	3	(3)
Employee stock-based compensation		25,443				25,443
Common stock withheld related to net share settlement of equity awards		(30,240)				(30,240)
Warrants exercised	15	44,227				44,242
Total comprehensive income (loss)				464,038	(22,647)	441,391
Ending Balance at Dec. 31, 2023	$ 306	$ 720,029	$ (1,109,679)	$ 1,830,018	$ 38,782	$ 1,479,456