CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Class A Common Stock	Total Stockholders’ Equity	Common Stock Class A Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Cumulative Dividends in Excess of Earnings	Noncontrolling Interests
Beginning balance at Dec. 31, 2017	$ 3,363,448		$ 3,278,782	$ 2,049	$ 4,508,528	$ 274	$ (1,232,069)	$ 84,666
Beginning balance (in shares) at Dec. 31, 2017				204,892,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based award transactions, net	3,507		3,507	$ 3	3,504
Share-based award transactions, net (in shares)				289,000
Repurchase and cancellation of common stock	(2,709)		(2,709)	$ (1)	(2,708)
Repurchase and cancellation of common stock (in shares)				(92,000)
Redemption of noncontrolling interest and other	0		2,413	$ 1	2,412			(2,413)
Redemption of noncontrolling interest and other (in shares)				91,000
Dividends declared ($0.310 per common share)	(63,866)		(62,559)				(62,559)	(1,307)
Net income	9,983		9,802				9,802	181
Other comprehensive income (loss)	900		883			883		17
Ending balance at Mar. 31, 2018	3,311,263		3,230,119	$ 2,052	4,511,736	1,157	(1,284,826)	81,144
Ending balance (in shares) at Mar. 31, 2018				205,180,000
Beginning balance at Dec. 31, 2018	3,334,914		3,256,024	$ 2,053	4,525,969	307	(1,272,305)	78,890
Beginning balance (in shares) at Dec. 31, 2018		205,267,349		205,267,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based award transactions, net	3,389		3,389	$ 3	3,386			0
Share-based award transactions, net (in shares)				293,000
Repurchase and cancellation of common stock	(11,926)		(11,926)	$ (5)	(11,921)
Repurchase and cancellation of common stock (in shares)				(478,000)
Redemption of noncontrolling interest and other	0		527	$ 0	527			(527)
Redemption of noncontrolling interest and other (in shares)				18,000
Dividends declared ($0.310 per common share)	(64,884)		(63,578)				(63,578)	(1,306)
Net income	13,673		13,440				13,440	233
Other comprehensive income (loss)	(390)		(382)			(382)		(8)
Ending balance at Mar. 31, 2019	$ 3,274,776		$ 3,197,494	$ 2,051	$ 4,517,961	$ (75)	$ (1,322,443)	$ 77,282
Ending balance (in shares) at Mar. 31, 2019		205,099,708		205,100,000