Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Adoption of ASU 2016-13, see Note 2 [Member]	Class A Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Adoption of ASU 2016-13, see Note 2 [Member]	Stockholders' Equity [Member]	Stockholders' Equity [Member] Adoption of ASU 2016-13, see Note 2 [Member]	Non-controlling Interests [Member]	Non-controlling Interests [Member] Adoption of ASU 2016-13, see Note 2 [Member]
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	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
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)
Other comprehensive income (loss)	25,159
Net (loss) income	(34,780)
Balance at Jun. 30, 2020	3,895,784		1,462	4,685,159	8,925	(820,783)		3,874,763		21,021
Balance at Mar. 31, 2020	3,674,427		1,354	4,378,851	18,248	(747,533)		3,650,920		23,507
Shares of class A common stock issued, net	297,599		108	297,491				297,599
Restricted class A common stock earned	8,527			8,527				8,527
Dividends reinvested	13			165		(152)		13
Deferred directors' compensation	125			125				125
Other comprehensive income (loss)	(9,323)				(9,323)			(9,323)
Net (loss) income	18,505					17,544		17,544		961
Dividends declared on common stock, $0.62 per share	(90,642)					(90,642)		(90,642)
Distributions to non-controlling interests	(3,447)									(3,447)
Balance at Jun. 30, 2020	3,895,784		1,462	4,685,159	8,925	(820,783)		3,874,763		21,021
Balance at Dec. 31, 2020	3,904,231		1,468	4,702,713	11,170	(829,284)		3,886,067		18,164
Shares of class A common stock issued, net	2		2					2
Restricted class A common stock earned	7,958			7,958				7,958
Dividends reinvested	14			190		(176)		14
Deferred directors' compensation	125			125				125
Other comprehensive income (loss)	114				114			114
Net (loss) income	80,540					79,902		79,902		638
Dividends declared on common stock, $0.62 per share	(91,159)					(91,159)		(91,159)
Contributions from non-controlling interests	13,448									13,448
Distributions to non-controlling interests	(11,180)									(11,180)
Balance at Mar. 31, 2021	3,904,093		1,470	4,710,986	11,284	(840,717)		3,883,023		21,070
Balance at Dec. 31, 2020	3,904,231		1,468	4,702,713	11,170	(829,284)		3,886,067		18,164
Other comprehensive income (loss)	(427)
Net (loss) income	213,008
Balance at Jun. 30, 2021	3,956,955		1,470	4,719,203	10,743	(800,455)		3,930,961		25,994
Balance at Mar. 31, 2021	3,904,093		1,470	4,710,986	11,284	(840,717)		3,883,023		21,070
Restricted class A common stock earned	7,895			7,895				7,895
Dividends reinvested	14			197		(183)		14
Deferred directors' compensation	125			125				125
Other comprehensive income (loss)	(541)				(541)			(541)
Net (loss) income	132,468					131,595		131,595		873
Dividends declared on common stock, $0.62 per share	(91,150)					(91,150)		(91,150)
Contributions from non-controlling interests	14,745									14,745
Distributions to non-controlling interests	(10,694)									(10,694)
Balance at Jun. 30, 2021	$ 3,956,955		$ 1,470	$ 4,719,203	$ 10,743	$ (800,455)		$ 3,930,961		$ 25,994