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, 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	65,381	23	65,358			65,381
Restricted class A common stock earned	7,639		7,639			7,639
Dividends reinvested	11		143		(132)	11
Deferred directors' compensation	125		125			125
Other comprehensive income (loss)	3,466			3,466		3,466
Net (loss) income	76,867				76,565	76,565	302
Dividends declared on common stock, $0.62 per share	(77,913)				(77,913)	(77,913)
Contributions from non-controlling interests	1,470						1,470
Distributions to non-controlling interests	(64)						(64)
Balance at Mar. 31, 2019	3,451,589	1,257	4,039,805	(30,756)	(570,908)	3,439,398	12,191
Balance at Dec. 31, 2019	3,784,681	1,350	4,370,014	(16,233)	(592,548)	3,762,583	22,098
Shares of class A common stock issued, net	4	4				4
Restricted class A common stock earned	8,550		8,550			8,550
Dividends reinvested	12		162		(150)	12
Deferred directors' compensation	125		125			125
Other comprehensive income (loss)	34,481			34,481		34,481
Net (loss) income	(53,283)				(53,350)	(53,350)	67
Dividends declared on common stock, $0.62 per share	(83,920)				(83,920)	(83,920)
Contributions from non-controlling interests	8,108						8,108
Distributions to non-controlling interests	(6,681)						(6,681)
Balance at Mar. 31, 2020	3,674,427	$ 1,354	$ 4,378,851	$ 18,248	(747,533)	3,650,920	23,507
Adoption of ASU 2016-13, see Note 2 | Accounting Standards Update 2016-13 [Member]	$ (17,650)				$ (17,565)	$ (17,565)	$ (85)