CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	(DISTRIBUTIONS IN EXCESS OF EARNINGS) EARNINGS IN EXCESS OF DISTRIBUTIONS	ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET	NONCONTROLLING INTERESTS	REDEEMABLE NONCONTROLLING INTERESTS
Beginning of Period at Dec. 31, 2019	$ 1,464,227	$ 2,873	$ 4,298,566	$ (2,574,896)	$ (262,581)	$ 265
Balance (in shares) at Dec. 31, 2019		287,299,645
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	34,639	$ 9	34,630
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		863,321
Change in equity related to redeemable noncontrolling interests	2,603		2,603				$ (2,603)
Parent cash dividends declared	(538,531)			(538,531)
Foreign currency translation adjustment	(109,090)				(109,090)
Change in fair value of derivative instruments	(11,507)				(11,507)
Net income (loss)	94,905			95,283		(378)
End of period at Sep. 30, 2020	937,246	$ 2,882	4,335,799	(3,018,144)	(383,178)	(113)
Balance (in shares) at Sep. 30, 2020		288,162,966
Beginning of redeemable noncontrolling interest at Dec. 31, 2019							67,682
Increase (Decrease) in Temporary Equity [Roll Forward]
Change in equity related to redeemable noncontrolling interests	2,603		2,603				(2,603)
Foreign currency translation adjustment							(652)
Net income (loss)							1,436
Noncontrolling interests dividends							(2,197)
Ending of redeemable noncontrolling interest at Sep. 30, 2020							63,666
Beginning of Period at Jun. 30, 2020	1,024,331	$ 2,881	4,325,803	(2,876,861)	(427,523)	31
Balance (in shares) at Jun. 30, 2020		288,142,703
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	9,997	$ 1	9,996
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		20,263
Parent cash dividends declared	(179,677)			(179,677)
Foreign currency translation adjustment	44,529				44,529
Change in fair value of derivative instruments	(184)				(184)
Net income (loss)	38,250			38,394		(144)
End of period at Sep. 30, 2020	937,246	$ 2,882	4,335,799	(3,018,144)	(383,178)	(113)
Balance (in shares) at Sep. 30, 2020		288,162,966
Beginning of redeemable noncontrolling interest at Jun. 30, 2020							63,512
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment							354
Net income (loss)							312
Noncontrolling interests dividends							(512)
Ending of redeemable noncontrolling interest at Sep. 30, 2020							63,666
Beginning of Period at Dec. 31, 2020	$ 1,136,729	$ 2,883	4,340,078	(2,950,339)	(255,893)	0
Balance (in shares) at Dec. 31, 2020	288,273,049	288,273,049
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	$ 66,507	$ 12	66,495
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		1,273,097
Change in equity related to redeemable noncontrolling interests	680		680				(512)
Parent cash dividends declared	(540,045)			(540,045)
Foreign currency translation adjustment	(114,112)				(114,065)
Change in fair value of derivative instruments	35,505				35,505
Net income (loss)	388,571			388,571		0
End of period at Sep. 30, 2021	$ 975,146	$ 2,895	4,407,253	(3,101,813)	(334,453)	1,264
Balance (in shares) at Sep. 30, 2021	289,546,146	289,546,146
Beginning of redeemable noncontrolling interest at Dec. 31, 2020	$ 59,805						59,805
Increase (Decrease) in Temporary Equity [Roll Forward]
Change in equity related to redeemable noncontrolling interests	680		680				(512)
Foreign currency translation adjustment						(47)	(963)
Net income (loss)							2,693
Noncontrolling interests equity contributions							2,200
Noncontrolling interests dividends							(1,882)
Purchase of noncontrolling interests	1,311					1,311	2,567
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021	61,390						61,390
Beginning of Period at Jun. 30, 2021	1,147,742	$ 2,895	4,392,396	(2,988,896)	(258,653)	0
Balance (in shares) at Jun. 30, 2021		289,458,768
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	14,857	$ 0	14,857
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		87,378
Change in equity related to redeemable noncontrolling interests							168
Parent cash dividends declared	(180,600)			(180,600)
Foreign currency translation adjustment	(90,512)				(90,465)
Change in fair value of derivative instruments	14,665				14,665
Net income (loss)	67,683			67,683
End of period at Sep. 30, 2021	$ 975,146	$ 2,895	$ 4,407,253	$ (3,101,813)	$ (334,453)	1,264
Balance (in shares) at Sep. 30, 2021	289,546,146	289,546,146
Beginning of redeemable noncontrolling interest at Jun. 30, 2021							64,660
Increase (Decrease) in Temporary Equity [Roll Forward]
Change in equity related to redeemable noncontrolling interests							168
Foreign currency translation adjustment						(47)	(751)
Net income (loss)							428
Noncontrolling interests dividends							(597)
Purchase of noncontrolling interests	$ 1,311					$ 1,311
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021	$ 61,390						$ 61,390