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Equity - Schedule of Shares Issued (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Performance Shares [Member]    
Class of Stock [Line Items]    
Shares vested measurement period (in years) 3 years  
Performance Shares [Member] | Index Performance Shares - 1Q [Member]    
Class of Stock [Line Items]    
Shares granted (in shares) 106,706 404,466
Grant date fair value per share (in dollars per share) $ 6.82 $ 4.53
Performance Shares [Member] | Peer Performance Shares - 1Q [Member]    
Class of Stock [Line Items]    
Shares granted (in shares) 106,705 404,463
Grant date fair value per share (in dollars per share) $ 6.34 $ 4.58
Performance Shares [Member] | Index Performance Shares - 2Q [Member]    
Class of Stock [Line Items]    
Shares granted (in shares) 163,466 0
Grant date fair value per share (in dollars per share) $ 4.05 $ 0.00
Performance Shares [Member] | Peer Performance Shares - 2Q [Member]    
Class of Stock [Line Items]    
Shares granted (in shares) 163,463 0
Grant date fair value per share (in dollars per share) $ 4.27 $ 0.00
Restricted Stock [Member]    
Class of Stock [Line Items]    
Shares granted (in shares) 237,560 225,090
Grant date fair value $ 2,551 $ 1,724
Award requisite service period (in years) 3 years