Noncontrolling Interests Redeemable Property Partnerships (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning Balance	$ 0
Acquisition Date Fair Value of Redeemable Interest	98,787
Net Loss	(719)
Distributions	(3,032)
Adjustment to Reflect Redeemable Interest at Redemption Value	2,522
Ending Balance	$ 97,558