Equity Stock Redeemed and Retired (Details) (7.55% Series D Cumulative Redeemable Preferred Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
7.55% Series D Cumulative Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Shares redeemed and retired				6,200,000
Redemption cost				$ 155,621	[1]
Deemed dividend	$ 0	$ 5,230	$ 0	$ 5,230	[2]

[1] Includes accrued and unpaid dividends.

[2] Represents the difference between the redemption cost and historical GAAP cost. Accordingly, net income was adjusted for the deemed dividend to arrive at net loss attributable to common shareholders.