Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common stock	Other paid-in capital	Retained earnings	Total accumulated other comprehensive loss	Treasury stock
Balance (in shares) at Dec. 31, 2018		196,564,907
Treasury stock (in shares) at Dec. 31, 2018						(538,921)
Balance at Dec. 31, 2018	$ 2,566,775	$ 196,565	$ 1,248,576	$ 1,163,602	$ (38,342)	$ (3,626)
Net income	335,453			335,453
Other comprehensive income (loss)	(3,760)				(3,760)
Dividends declared on common stock	(162,408)			(162,408)
Employee stock-based compensation	7,353		7,353
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings			(3,261)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	(3,015)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings (in shares)		246,214
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings		$ 246
Issuance of common stock (in shares)		4,111,669
Issuance of common stock	106,848	$ 4,112	102,736
Balance at Dec. 31, 2019	2,847,246	$ 200,923	1,355,404	1,336,647	(42,102)	$ (3,626)
Balance (in shares) at Dec. 31, 2019		200,922,790
Treasury stock (in shares) at Dec. 31, 2019						(538,921)
Net income	390,205			390,205
Other comprehensive income (loss)	(5,976)				(5,976)
Dividends declared on common stock	(168,489)			(168,489)
Employee stock-based compensation	13,096		13,096
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings			(388)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	(362)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings (in shares)		26,406
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings		$ 26
Issuance of common stock (in shares)		112,002
Issuance of common stock	3,385	$ 112	3,273
Balance at Dec. 31, 2020	$ 3,079,105	$ 201,061	1,371,385	1,558,363	(48,078)	$ (3,626)
Balance (in shares) at Dec. 31, 2020	201,061,198	201,061,198
Treasury stock (in shares) at Dec. 31, 2020						(538,921)
Net income	$ 378,131			378,131
Other comprehensive income (loss)	7,074				7,074
Dividends declared on common stock	(174,084)			(174,084)
Employee stock-based compensation	14,709		14,709
Repurchase of common stock (in shares)						(392,294)
Repurchase of common stock	(6,701)					$ (6,701)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings			(10,828)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings (in shares)						392,294
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings						$ 6,701
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	(4,127)
Issuance of common stock (in shares)		2,828,463
Issuance of common stock	88,767	$ 2,828	85,939
Balance at Dec. 31, 2021	$ 3,382,874	$ 203,889	$ 1,461,205	$ 1,762,410	$ (41,004)	$ (3,626)
Balance (in shares) at Dec. 31, 2021	203,889,661	203,889,661
Treasury stock (in shares) at Dec. 31, 2021						(538,921)