CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated earnings less dividends	Accumulated other comprehensive loss
Beginning Balance (in shares) at Dec. 31, 2015		137,002,031
Beginning Balance at Dec. 31, 2015	$ 9,840,526	$ 1,370	$ 10,068,532	$ (197,989)	$ (31,387)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common stockholders	1,034,002			1,034,002
Income (loss) on cash flow hedges	(5,556)				(5,556)
Cash flow hedge losses reclassified to earnings	6,433				6,433
Change in redemption value of redeemable noncontrolling interest	1,489		0	1,489
Dividends declared to common stockholders	(741,313)			(741,313)
Issuance of common stock, net of withholdings (in shares)		328,873
Issuance of common stock, net of withholdings	10,695	$ 3	11,982	(1,290)
Amortization of deferred compensation	25,140		25,140
Ending Balance (in shares) at Dec. 31, 2016		137,330,904
Ending Balance at Dec. 31, 2016	10,171,416	$ 1,373	10,105,654	94,899	(30,510)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common stockholders	876,921			876,921
Income (loss) on cash flow hedges	(13,979)				(13,979)
Cash flow hedge losses reclassified to earnings	7,070				7,070
Change in redemption value of redeemable noncontrolling interest	2,026			2,026
Dividends declared to common stockholders	(783,912)			(783,912)
Issuance of common stock, net of withholdings (in shares)		763,250
Issuance of common stock, net of withholdings	100,304	$ 8	101,621	(1,325)
Amortization of deferred compensation	28,200		28,200
Ending Balance (in shares) at Dec. 31, 2017		138,094,154
Ending Balance at Dec. 31, 2017	10,388,046	$ 1,381	10,235,475	188,609	(37,419)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common stockholders	974,525			974,525
Income (loss) on cash flow hedges	5,132				5,132
Cash flow hedge losses reclassified to earnings	6,143				6,143
Change in redemption value of redeemable noncontrolling interest	223			223
Dividends declared to common stockholders	(813,722)			(813,722)
Issuance of common stock, net of withholdings (in shares)		414,270
Issuance of common stock, net of withholdings	40,554	$ 4	39,408	1,142
Amortization of deferred compensation	31,705		31,705
Ending Balance (in shares) at Dec. 31, 2018		138,508,424
Ending Balance at Dec. 31, 2018	$ 10,632,606	$ 1,385	$ 10,306,588	$ 350,777	$ (26,144)