Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	Noncontrolling Interests in Consolidated Subsidiaries	Total
Balance at beginning of period at Dec. 31, 2018	$ 1,210	$ 3,155,256	$ (176,018)	$ 6,700	$ 204	$ 2,987,352
Balance at beginning of period (in shares) at Dec. 31, 2018	120,937
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common shareholders and noncontrolling interests			24,861			24,861
Conversion of common limited partnership units to common shares	$ 17	57,089				57,106
Conversion of common limited partnership units to common shares	1,657
Contributions from (distributions to) noncontrolling interests					161	161
Redeemable noncontrolling interests redemption value adjustment and other comprehensive (income) loss allocation		(62,212)		1,383		(60,829)
Other comprehensive loss				(11,535)		(11,535)
Balance at end of period (in shares) at Mar. 31, 2019	122,594
Balance at end of period at Mar. 31, 2019	$ 1,227	3,150,133	(151,157)	(3,452)	365	2,997,116
Balance at beginning of period at Dec. 31, 2019	$ 1,342	3,633,042	(231,164)	(16,744)	201	$ 3,386,677
Balance at beginning of period (in shares) at Dec. 31, 2019	134,148					134,148
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common shareholders and noncontrolling interests			42,925			$ 42,925
Common shares repurchased	$ (14)	(41,163)				(41,177)
Common shares repurchased (in shares)	(1,418)
Common shares issued pursuant to Employee Share Purchase Plan		132				132
Conversion of common limited partnership units to common shares	$ 8	31,118				31,126
Conversion of common limited partnership units to common shares	787
Contributions from (distributions to) noncontrolling interests					2	2
Redeemable noncontrolling interests redemption value adjustment and other comprehensive (income) loss allocation		100,666		3,573		104,239
Other comprehensive loss				(32,770)		$ (32,770)
Balance at end of period (in shares) at Mar. 31, 2020	133,517					133,517
Balance at end of period at Mar. 31, 2020	$ 1,336	$ 3,723,795	$ (188,239)	$ (45,941)	$ 203	$ 3,491,154