Restatement - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]      
Goodwill $ 283,664   $ 285,848
Gain on dispositions of assets 9,151 $ 1,535  
Real estate assets held for sale, net 175,794   119,046
Impairments 2,200 1,911  
Common stock, $0.01 par value $ 4,184   $ 4,113
Common stock, shares outstanding (in shares) 418,401,109   411,350,440
Correction of Allocation of Goodwill to the Disposal of Real Estate Assets | Restatement Adjustments      
Error Corrections and Prior Period Adjustments Restatement [Line Items]      
Goodwill $ (7,757)   $ (5,573)
Gain on dispositions of assets (2,185) (187)  
Real estate assets held for sale, net (1,443)   (866)
Impairments 576 $ 204  
Common stock, $0.01 par value (5)   $ (5)
Retirement of Common Stock Previously Classified as Treasury Stock [Member] | Restatement Adjustments      
Error Corrections and Prior Period Adjustments Restatement [Line Items]      
Common stock, $0.01 par value $ (4,900)    
Common stock, shares outstanding (in shares) (473,599)