Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income/(loss)	Total stockholders' equity	Noncontrolling Interests
Balance at Dec. 31, 2019	$ 4,425,002	$ 1	$ 2,300,926	$ 2,161,049	$ (41,492)	$ 4,420,484	$ 4,518
Balance, Shares at Dec. 31, 2019		112,476
Net income	63,846	$ 0	0	63,204	0	63,204	642
Dividends on common shares	(49,702)	0	0	(49,702)	0	(49,702)	0
Purchase of Company shares	(65,785)	$ 0	(65,785)	0	0	(65,785)	0
Purchase of Company shares, shares		(1,703)
Shares issued in connection with share-based compensation	(14,378)	$ 0	(13,547)	(831)	0	(14,378)	0
Shares issued in connection with share-based compensation, shares		644
Share-based compensation	25,903	$ 0	25,903	0	0	25,903	0
Net activity related to noncontrolling interests	4,489	0	72	0	0	72	4,417
Other comprehensive loss	(20,453)	0	0	0	(20,453)	(20,453)	0
Balance at Mar. 31, 2020	4,368,922	$ 1	2,247,569	2,173,720	(61,945)	4,359,345	9,577
Balance, Shares at Mar. 31, 2020		111,417
Balance at Dec. 31, 2020	$ 4,921,648	$ 1	2,214,935	2,655,495	39,541	4,909,972	11,676
Balance, Shares at Dec. 31, 2020	110,353	110,353
Net income	$ 234,458	$ 0	0	233,616	0	233,616	842
Dividends on common shares	(50,985)	0	0	(50,985)	0	(50,985)	0
Purchase of Company shares	(64,786)	$ 0	(64,786)	0	0	(64,786)	0
Purchase of Company shares, shares		(1,226)
Shares issued in connection with share-based compensation	(8,378)	$ 0	(7,493)	(885)	0	(8,378)	0
Shares issued in connection with share-based compensation, shares		614
Share-based compensation	31,203	$ 0	31,203	0	0	31,203	0
Net activity related to noncontrolling interests	(2,115)	0	0	0	0	0	(2,115)
Other comprehensive loss	(95,370)	0	0	0	(95,369)	(95,369)	(1)
Balance at Mar. 31, 2021	$ 4,965,675	$ 1	$ 2,173,859	$ 2,837,241	$ (55,828)	$ 4,955,273	$ 10,402
Balance, Shares at Mar. 31, 2021	109,741	109,741