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Redeemable Noncontrolling Interests (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Redeemable Noncontrolling Interests [Abstract]    
Redeemable noncontrolling interests begining balance $ 91,480 $ 86,153
Issuance of redeemable partnership interests   4,943
Fair market value adjustment, net   225
Other $ (14) 42
Redeemable noncontrolling interests ending balance $ 91,466 $ 91,363