Noncontrolling Interests Noncontrolling Redeemable Property Partnerships (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Noncontrolling Interest Redeemable Property Partnership [Abstract]
Cumulative non-cash adjustment to the accretion of the changes in the redemption value of the noncontrolling interest		$ 2,400
Beginning Balance	$ 104,692	99,609
Net Income (Loss) for Redeemable interest in Property Partnership	(24)	(240)
Distributions on Redeemable Property Partnership	(2,900)	(2,300)
Adjustment to Reflect Redeemable Interest at Redemption Value	4,465	6,709	[1]
Ending Balance	$ 106,233	$ 103,778

[1] (1) Includes an out-of-period adjustment totaling approximately $2.4 million (See Note 2).