Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred stock 7.00% Series A cumulative redeemable preferred stock	Common stock Class A common stock	Additional paid-in capital	Accumulated distributions in excess of earnings	Accumulated other comprehensive income (loss)	Total shareholders' equity	Noncontrolling interests
Balance at Dec. 31, 2016	$ 2,152,086	$ 5	$ 237	$ 4,927,155	$ (2,776,033)	$ 722	$ 2,152,086	$ 0
Balance (in shares) at Dec. 31, 2016		5,400	236,770
Increase (Decrease) in Shareholders' Equity
Net income	251,491				251,491		251,491
Other comprehensive income (loss)	352					352	352
Redemption of preferred stock	(135,000)	$ (5)		(130,289)	(4,706)		(135,000)
Redemption of preferred stock (in shares)		(5,400)
Distributions declared to preferred shareholders	(9,161)				(9,161)		(9,161)
Distributions declared to common shareholders	(151,612)				(151,612)		(151,612)
Shares repurchased through common stock repurchase program	(227,102)		$ (18)	(227,084)			(227,102)
Shares repurchased through common stock repurchase program (in shares)			(17,683)
Issuance of restricted shares (in shares)			285
Stock-based compensation expense, net of forfeitures	6,059			6,059			6,059
Stock-based compensation expense, net of forfeitures (in shares)			(40)
Shares withheld for employee taxes	(1,413)			(1,413)			(1,413)
Shares withheld for employee taxes (in shares)			(95)
Balance at Dec. 31, 2017	1,885,700	$ 0	$ 219	4,574,428	(2,690,021)	1,074	1,885,700	0
Balance (in shares) at Dec. 31, 2017		0	219,237
Increase (Decrease) in Shareholders' Equity
Cumulative effect of accounting change					(12)	12
Net income	77,640				77,640		77,640
Other comprehensive income (loss)	(2,608)					(2,608)	(2,608)
Contributions from noncontrolling interests	418							418
Distributions declared to common shareholders	(144,409)				(144,409)		(144,409)
Issuance of common stock (in shares)			59
Shares repurchased through common stock repurchase program	(74,952)		$ (6)	(74,946)			(74,952)
Shares repurchased through common stock repurchase program (in shares)			(6,341)
Issuance of restricted shares (in shares)			382
Stock-based compensation expense, net of forfeitures	6,992			6,992			6,992
Stock-based compensation expense, net of forfeitures (in shares)			(12)
Shares withheld for employee taxes	(1,772)			(1,772)			(1,772)
Shares withheld for employee taxes (in shares)			(149)
Balance at Dec. 31, 2018	1,747,009	$ 0	$ 213	4,504,702	(2,756,802)	(1,522)	1,746,591	418
Balance (in shares) at Dec. 31, 2018		0	213,176
Increase (Decrease) in Shareholders' Equity
Net income	32,397				32,397		32,397
Other comprehensive income (loss)	(10,766)					(10,766)	(10,766)
Contributions from noncontrolling interests	3,178							3,178
Distributions declared to common shareholders	(141,528)				(141,528)		(141,528)
Issuance of common stock (in shares)			111
Issuance of restricted shares	1		$ 1				1
Issuance of restricted shares (in shares)			469
Stock-based compensation expense, net of forfeitures	7,559			7,559			7,559
Stock-based compensation expense, net of forfeitures (in shares)			(16)
Shares withheld for employee taxes	(1,777)			(1,777)			(1,777)
Shares withheld for employee taxes (in shares)			(140)
Balance at Dec. 31, 2019	$ 1,636,073	$ 0	$ 214	$ 4,510,484	$ (2,865,933)	$ (12,288)	$ 1,632,477	$ 3,596
Balance (in shares) at Dec. 31, 2019		0	213,600