Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect Period of Adoption Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect Period of Adoption Adjustment	Total Stockholders' Equity	Total Stockholders' Equity Cumulative Effect Period of Adoption Adjustment	Non-controlling Interest-Operating Partnership
Balance at Dec. 31, 2018	$ 1,415,059		$ 1,187	$ 1,807,202	$ (393,330)
Balance (in shares) at Dec. 31, 2018			118,674
Net income	49,340				49,340
Retirement of common stock	(3,070)		$ (1)	(3,069)
Retirement of common stock (in shares)			(143)
Dividends declared on common stock	(52,994)				(52,994)
Restricted stock compensation, net of forfeitures	3,812			3,812
Restricted stock grants			$ 5	(5)
Restricted stock grants (in shares)			521
Stock options exercised	207			207
Stock options exercised (in shares)			16
Balance at Mar. 31, 2019	1,382,414	$ (29,940)	$ 1,191	1,808,147	(426,924)	$ (29,940)
Balance (in shares) at Mar. 31, 2019			119,068
Balance at Dec. 31, 2018	1,415,059		$ 1,187	1,807,202	(393,330)
Balance (in shares) at Dec. 31, 2018			118,674
Net income	146,912
Balance at Sep. 30, 2019	1,383,201		$ 1,191	1,817,258	(435,248)
Balance (in shares) at Sep. 30, 2019			119,096
Balance at Mar. 31, 2019	1,382,414	(29,940)	$ 1,191	1,808,147	(426,924)	(29,940)
Balance (in shares) at Mar. 31, 2019			119,068
Net income	48,578				48,578
Retirement of common stock	(460)			(460)
Retirement of common stock (in shares)			(21)
Dividends declared on common stock	(52,865)				(52,865)
Restricted stock compensation, net of forfeitures	4,256			4,256
Restricted stock grants (in shares)			3
Stock options exercised	668			668
Stock options exercised (in shares)			46
Balance at Jun. 30, 2019	1,382,591		$ 1,191	1,812,611	(431,211)
Balance (in shares) at Jun. 30, 2019			119,096
Net income	48,994				48,994
Dividends declared on common stock	(53,031)				(53,031)
Restricted stock compensation, net of forfeitures	4,647			4,647
Balance at Sep. 30, 2019	1,383,201		$ 1,191	1,817,258	(435,248)
Balance (in shares) at Sep. 30, 2019			119,096
Balance at Dec. 31, 2019	1,376,749		$ 1,191	1,821,810	(446,252)		$ 1,376,749
Balance (in shares) at Dec. 31, 2019			119,096
Net income	33,238				32,057		32,057		$ 1,181
Retirement of common stock	(3,560)		$ (2)	(3,558)			(3,560)
Retirement of common stock (in shares)			(207)
Dividends declared on common stock	(53,415)				(53,415)		(53,415)
Restricted stock compensation, net of forfeitures	4,610			4,610			4,610
Restricted stock grants			$ 7	(7)
Restricted stock grants (in shares)			740
Balance at Mar. 31, 2020	1,378,676	(1,036)	$ 1,196	1,822,855	(468,646)	(1,036)	1,355,405	$ (1,036)	23,271
Contributions to operating partnership	23,271								23,271
Distributions to non-controlling interest	(1,181)								(1,181)
Balance (in shares) at Mar. 31, 2020			119,629
Balance at Dec. 31, 2019	1,376,749		$ 1,191	1,821,810	(446,252)		1,376,749
Balance (in shares) at Dec. 31, 2019			119,096
Net income	82,141
Balance at Sep. 30, 2020	1,435,992		$ 1,196	1,831,241	(419,716)		1,412,721		23,271
Balance (in shares) at Sep. 30, 2020			119,634
Balance at Mar. 31, 2020	1,378,676	$ (1,036)	$ 1,196	1,822,855	(468,646)	$ (1,036)	1,355,405	$ (1,036)	23,271
Balance (in shares) at Mar. 31, 2020			119,629
Net income	22,186				22,186		22,186
Restricted stock compensation, net of forfeitures	4,319			4,319			4,319
Restricted stock grants (in shares)			2
Balance at Jun. 30, 2020	1,405,181		$ 1,196	1,827,174	(446,460)		1,381,910		23,271
Balance (in shares) at Jun. 30, 2020			119,631
Net income	26,717				26,717		26,717
Retirement of common stock	(15)			(15)			(15)
Retirement of common stock (in shares)			(2)
Reductions in dividends on RSUs	27				27		27
Restricted stock compensation, net of forfeitures	4,082			4,082			4,082
Restricted stock grants (in shares)			5
Balance at Sep. 30, 2020	$ 1,435,992		$ 1,196	$ 1,831,241	$ (419,716)		$ 1,412,721		$ 23,271
Balance (in shares) at Sep. 30, 2020			119,634