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	24,642	$ 8	24,634
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		843,058
Change in equity related to redeemable noncontrolling interests	2,603		2,603				$ (2,603)
Parent cash dividends declared	(358,854)			(358,854)
Foreign currency translation adjustment	(153,619)				(153,619)
Change in fair value of derivative instruments	(11,323)				(11,323)
Net income (loss)	56,655			56,889		(234)
End 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
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							(1,006)
Net income (loss)							1,124
Noncontrolling interests dividends							(1,685)
Ending of redeemable noncontrolling interest at Jun. 30, 2020							63,512
Beginning of Period at Mar. 31, 2020	1,123,841	$ 2,879	4,304,477	(2,690,433)	(493,248)	166
Balance (in shares) at Mar. 31, 2020		287,879,142
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	22,725	$ 2	22,723
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		263,561
Change in equity related to redeemable noncontrolling interests	(1,397)		(1,397)				1,397
Parent cash dividends declared	(179,342)			(179,342)
Foreign currency translation adjustment	68,686				68,686
Change in fair value of derivative instruments	(2,961)				(2,961)
Net income (loss)	(7,221)			(7,086)		(135)
End 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
Beginning of redeemable noncontrolling interest at Mar. 31, 2020							62,157
Increase (Decrease) in Temporary Equity [Roll Forward]
Change in equity related to redeemable noncontrolling interests	(1,397)		(1,397)				1,397
Foreign currency translation adjustment							341
Net income (loss)							108
Noncontrolling interests dividends							(491)
Ending of redeemable noncontrolling interest at Jun. 30, 2020							63,512
Beginning of Period at Dec. 31, 2020	$ 1,136,729	$ 2,883	4,340,078	(2,950,339)	(255,893)
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	$ 51,650	$ 12	51,638
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		1,185,719
Change in equity related to redeemable noncontrolling interests	680		680				(680)
Parent cash dividends declared	(359,445)			(359,445)
Foreign currency translation adjustment	(23,600)				(23,600)
Change in fair value of derivative instruments	20,840				20,840
Net income (loss)	320,888			320,888
End of period at Jun. 30, 2021	$ 1,147,742	$ 2,895	4,392,396	(2,988,896)	(258,653)
Balance (in shares) at Jun. 30, 2021	289,458,768	289,458,768
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				(680)
Foreign currency translation adjustment							(212)
Net income (loss)							2,265
Noncontrolling interests equity contributions							2,200
Noncontrolling interests dividends							(1,285)
Purchase of noncontrolling interests							2,567
Ending of redeemable noncontrolling interest at Jun. 30, 2021	64,660						64,660
Beginning of Period at Mar. 31, 2021	959,707	$ 2,888	4,347,151	(3,083,421)	(306,911)
Balance (in shares) at Mar. 31, 2021		288,727,747
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	45,252	$ 7	45,245
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		731,021
Parent cash dividends declared	(180,760)			(180,760)
Foreign currency translation adjustment	42,624				42,624
Change in fair value of derivative instruments	5,634				5,634
Net income (loss)	275,285			275,285
End of period at Jun. 30, 2021	$ 1,147,742	$ 2,895	$ 4,392,396	$ (2,988,896)	$ (258,653)
Balance (in shares) at Jun. 30, 2021	289,458,768	289,458,768
Beginning of redeemable noncontrolling interest at Mar. 31, 2021							61,601
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment							(81)
Net income (loss)							1,237
Noncontrolling interests dividends							(664)
Purchase of noncontrolling interests							2,567
Ending of redeemable noncontrolling interest at Jun. 30, 2021	$ 64,660						$ 64,660