Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016		Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Unaudited Quarterly Results of Operations
Revenues as reported and adjusted										$ 4,281,160	$ 3,859,826	$ 3,343,546
Net income (loss) attributable to common stockholders	$ 333,044	$ 334,910	[1]	$ 195,474	$ 148,969	$ 132,929	$ 182,043	$ 312,573	$ 190,799	$ 1,012,397	$ 818,344	$ 446,745
Net income (loss) attributable to common stockholders per share:
Basic	$ 0.92	$ 0.93	[1]	$ 0.55	$ 0.42	$ 0.38	$ 0.52	$ 0.89	$ 0.57	$ 2.83	$ 2.35	$ 1.46
Diluted	$ 0.91	$ 0.93	[1]	$ 0.54	$ 0.42	$ 0.37	$ 0.52	$ 0.89	$ 0.56	$ 2.81	$ 2.34	$ 1.45
Quarterly Results of Operations (Textuals) [Abstract]
Decreases in net income amounts and per share attributable to gains on sales of real estate		$ 162,351		$ 1,530
Scenario, Previously Reported [Member]
Summary of Unaudited Quarterly Results of Operations
Revenues as reported and adjusted	$ 1,078,321	$ 1,079,133	[1]	$ 1,076,657	$ 1,047,050	$ 1,029,484	$ 978,997	$ 957,169	$ 894,177

[1] The increase in net income and amounts per share are primarily attributable to gains on sales of real estate of $162,351,000 for the third quarter as compared to gains of $1,530,000 for the second quarter.