Noncontrolling Interests Redeemable Property Partnerships (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning Balance	$ 104,692	$ 99,609	$ 97,558
Net Loss	(7)	(603)	(1,839)
Distributions	(2,900)	(6,000)	(4,585)
Adjustment to reflect redeemable partnership units at redemption value	5,128	11,686	8,475
Acquisition of interest	(106,913)
Ending Balance	$ 0	$ 104,692	$ 99,609