Subsequent Events/Other (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Subsequent Event [Line Items]
Other Liabilities	$ 350,466	$ 366,387
Disposed Units	29,776	1,857
Proceeds From Sale Of Property	$ 6,943,458	$ 513,312
Interest and other income	65,773	7,372	$ 4,462
Business Combination, Acquisition Related Costs	1,500	1,000	400
Write-off of pursuit costs	4,092	3,208	3,607
Other Expenses	5,600	4,200	4,000
Litigation Settlement, Amount	$ 3,200	$ 6,000	$ 2,800
Military Housing [Member]
Subsequent Event [Line Items]
Disposed Units	5,161
Proceeds From Sale Of Property	$ 63,300
Interest and other income	52,400
Series P [Domain]
Subsequent Event [Line Items]
Preferred Stock Preference Units Dividend Rate Percentage			3.00%
Liquidation Value Preferred Interests			$ 18,400
Business Acquisition, Percentage of Voting Interests Acquired			95.00%
Redemption of Series P Preference Units	18,400
Other Liabilities	$ 18,400