Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Class A Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Accumulated Deficit [Member]	Stockholders' Equity [Member]	Non-controlling Interests [Member]
Balance at Dec. 31, 2017	$ 2,917,406	$ 1,079	$ 3,506,861	$ (29,706)	$ (567,168)	$ 2,911,066	$ 6,340
Shares of class A common stock issued, net	476,430	155	476,275			476,430
Restricted class A common stock earned	27,644		27,644			27,644
Issuance of convertible notes	1,462		1,462			1,462
Conversion of convertible notes	(46,720)		(46,720)			(46,720)
Dividends reinvested	53		518		(465)	53
Deferred directors' compensation	500		500			500
Other comprehensive income (loss)	(4,516)			(4,516)		(4,516)
Net income	285,813				285,078	285,078	735
Dividends declared on common stock, $2.48 per share	(286,873)				(286,873)	(286,873)
Contributions from non-controlling interests	9,315						9,315
Distributions to non-controlling interests	(5,907)						(5,907)
Balance at Dec. 31, 2018	3,374,607	1,234	3,966,540	(34,222)	(569,428)	3,364,124	10,483
Shares of class A common stock issued, net	372,348	116	372,232			372,348
Restricted class A common stock earned	30,146		30,146			30,146
Dividends reinvested	42		596		(554)	42
Deferred directors' compensation	500		500			500
Other comprehensive income (loss)	17,989			17,989		17,989
Net income	307,393				305,567	305,567	1,826
Dividends declared on common stock, $2.48 per share	(328,133)				(328,133)	(328,133)
Contributions from non-controlling interests	51,418						51,418
Distributions to non-controlling interests	(41,629)						(41,629)
Balance at Dec. 31, 2019	3,784,681	1,350	4,370,014	(16,233)	(592,548)	3,762,583	22,098
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019	(17,650)				(17,565)	(17,565)	(85)
Shares of class A common stock issued, net	297,609	118	297,491			297,609
Restricted class A common stock earned	34,023		34,023			34,023
Dividends reinvested	52		685		(633)	52
Deferred directors' compensation	500		500			500
Other comprehensive income (loss)	27,403			27,403		27,403
Net income	140,414				137,670	137,670	2,744
Dividends declared on common stock, $2.48 per share	(356,208)				(356,208)	(356,208)
Contributions from non-controlling interests	8,431						8,431
Distributions to non-controlling interests	(15,024)						(15,024)
Balance at Dec. 31, 2020	$ 3,904,231	$ 1,468	$ 4,702,713	$ 11,170	$ (829,284)	$ 3,886,067	$ 18,164