Noncontrolling Interest - Operating Partnership/Limited Partners' Equity - Preferred Units (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Preferred Units [Line Items]
Preferred Units, Outstanding	0	1,290,000
Preferred Units, Total Annual Cash Distributions	$ 1,600,000.0	$ 9,900,000.0	$ 21,000,000.00
Series I 2 [Member]
Preferred Units [Line Items]
Noncontrolling Interest in Operating Partnerships	7,537,000
Preferred Units, Outstanding	301,483	301,483
Redeemable Preferred Units Liquidation Preference	$ 25
Preferred Stock Dividends Rate Percentage Or Per Dollar Amount	6.25%
Preferred Units, Total Annual Cash Distributions	$ 471,000	$ 471,000	$ 57,000