Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Shareholders’ equity	Common Stock Class A common shares/units	Common Stock Class B common shares	Preferred shares	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income	Noncontrolling interest
Beginning balances at Dec. 31, 2017	$ 5,875,824	$ 5,149,629	$ 2,861	$ 6	$ 384	$ 5,600,256	$ (453,953)	$ 75	$ 726,195
Beginning balance (in shares) at Dec. 31, 2017			286,114,637	635,075	38,350,000
Increase (Decrease) in Stockholders' Equity
Share-based compensation	975	975				975
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes	(408)	(408)	$ 1			(409)
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)			59,187
Repurchase of common shares	(34,969)	(34,969)	$ (18)			(34,951)
Repurchase of common shares (in shares)			(1,804,163)
Distributions to equity holders:
Preferred shares (Note 10)	(14,597)	(14,597)					(14,597)
Noncontrolling interests	(2,768)								(2,768)
Common shares ($0.05 per share)	(14,365)	(14,365)					(14,365)
Net income	21,525	20,411					20,411		1,114
Total other comprehensive income (loss)	9,433	9,433						9,433
Ending balances at Mar. 31, 2018	5,840,650	5,116,109	$ 2,844	$ 6	$ 384	5,565,871	(462,504)	9,508	724,541
Ending balance (in shares) at Mar. 31, 2018			284,369,661	635,075	38,350,000
Beginning balances at Dec. 31, 2017	5,875,824	5,149,629	$ 2,861	$ 6	$ 384	5,600,256	(453,953)	75	726,195
Beginning balance (in shares) at Dec. 31, 2017			286,114,637	635,075	38,350,000
Distributions to equity holders:
Preferred shares (Note 10)	(26,581)
Net income	47,423
Total other comprehensive income (loss)	9,192
Ending balances at Jun. 30, 2018	5,868,762	5,148,530	$ 2,954	$ 6	$ 308	5,630,321	(494,326)	9,267	720,232
Ending balance (in shares) at Jun. 30, 2018			295,383,159	635,075	30,750,000
Beginning balances at Mar. 31, 2018	5,840,650	5,116,109	$ 2,844	$ 6	$ 384	5,565,871	(462,504)	9,508	724,541
Beginning balance (in shares) at Mar. 31, 2018			284,369,661	635,075	38,350,000
Increase (Decrease) in Stockholders' Equity
Share-based compensation	943	943				943
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes	3,068	3,068	$ 1			3,067
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)			164,671
Redemptions of units	28,258	28,258	$ 109		$ (76)	60,440	(32,215)
Redemptions of units (in shares)			10,848,827		7,600,000
Liquidation of consolidated joint venture	(241)	(1,849)					(1,849)		1,608
Distributions to equity holders:
Preferred shares (Note 10)	(11,984)	(11,984)					(11,984)
Noncontrolling interests	(2,767)								(2,767)
Common shares ($0.05 per share)	(14,822)	(14,822)					(14,822)
Net income	25,898	29,048					29,048		(3,150)
Total other comprehensive income (loss)	(241)	(241)						(241)
Ending balances at Jun. 30, 2018	5,868,762	5,148,530	$ 2,954	$ 6	$ 308	5,630,321	(494,326)	9,267	720,232
Ending balance (in shares) at Jun. 30, 2018			295,383,159	635,075	30,750,000
Beginning balances at Dec. 31, 2018	5,973,742	5,251,965	$ 2,960	$ 6	$ 354	5,732,466	(491,214)	7,393	721,777
Beginning balance (in shares) at Dec. 31, 2018			296,014,546	635,075	35,350,000
Increase (Decrease) in Stockholders' Equity
Share-based compensation	952	952				952
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes	(760)	(760)	$ 1			(761)
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)			77,830
Redemptions of units	0	6,522	$ 5			6,505		12	(6,522)
Redemptions of units (in shares)			500,000
Distributions to equity holders:
Preferred shares (Note 10)	(13,782)	(13,782)					(13,782)
Noncontrolling interests	(2,741)								(2,741)
Common shares ($0.05 per share)	(14,889)	(14,889)					(14,889)
Net income	33,091	30,065					30,065		3,026
Total other comprehensive income (loss)	(241)	(203)						(203)	(38)
Ending balances at Mar. 31, 2019	5,975,372	5,259,870	$ 2,966	$ 6	$ 354	5,739,162	(489,820)	7,202	715,502
Ending balance (in shares) at Mar. 31, 2019			296,592,376	635,075	35,350,000
Beginning balances at Dec. 31, 2018	5,973,742	5,251,965	$ 2,960	$ 6	$ 354	5,732,466	(491,214)	7,393	721,777
Beginning balance (in shares) at Dec. 31, 2018			296,014,546	635,075	35,350,000
Distributions to equity holders:
Preferred shares (Note 10)	(27,564)
Net income	73,395
Total other comprehensive income (loss)	(481)
Ending balances at Jun. 30, 2019	5,995,523	5,312,464	$ 2,998	$ 6	$ 354	5,784,398	(482,354)	7,062	683,059
Ending balance (in shares) at Jun. 30, 2019			299,827,789	635,075	35,350,000
Beginning balances at Mar. 31, 2019	5,975,372	5,259,870	$ 2,966	$ 6	$ 354	5,739,162	(489,820)	7,202	715,502
Beginning balance (in shares) at Mar. 31, 2019			296,592,376	635,075	35,350,000
Increase (Decrease) in Stockholders' Equity
Share-based compensation	1,269	1,269				1,269
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes	10,263	10,263	$ 6			10,257
Common stock issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)			645,567
Redemptions of units	0	33,799	$ 26			33,710		63	(33,799)
Redemptions of units (in shares)			2,589,846
Distributions to equity holders:
Preferred shares (Note 10)	(13,782)	(13,782)					(13,782)
Noncontrolling interests	(2,611)								(2,611)
Common shares ($0.05 per share)	(15,052)	(15,052)					(15,052)
Net income	40,304	36,300					36,300		4,004
Total other comprehensive income (loss)	(240)	(203)						(203)	(37)
Ending balances at Jun. 30, 2019	$ 5,995,523	$ 5,312,464	$ 2,998	$ 6	$ 354	$ 5,784,398	$ (482,354)	$ 7,062	$ 683,059
Ending balance (in shares) at Jun. 30, 2019			299,827,789	635,075	35,350,000