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Equity Awards - Restricted Shares Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares issued related to director fee deferrals       2,759    
Restricted Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Unvested Restricted Shares Granted       241,450    
Unrecognized unvested restricted shares-based compensation expense $ 6,400     $ 6,400    
Weighted-average period for recognition of the unrecognized unvested restricted shares-based compensation expense       2 years 1 month    
Restricted shares-based compensation expense $ 900   $ 2,000 $ 2,900 $ 4,200  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period       173,698    
Plan 1 [Member] | Service-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Unvested Restricted Shares Granted       174,874    
Award requisite service period       3 years    
Plan 2 [Member] | Service-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Unvested Restricted Shares Granted       35,813    
Award requisite service period       1 year    
Cash value of incentive plan       80.00%    
Restriced shares value of incentive plan       20.00%    
Plan 4 [Member] | Service-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Unvested Restricted Shares Granted       1,300    
Award requisite service period       1 year    
Plan 5 [Member] | Service-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award requisite service period       1 year    
Plan 5 [Member] | Service-based restriced shares [Member] | Non-employee independent director [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Unvested Restricted Shares Granted       26,704    
Minimum [Member] | Plan 2 [Member] | Service-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
ICP, Threshold target for granting stock awards       $ 20    
3 year EPS CAGR metric [Member] | Plan 3 [Member] | Performance-based restriced shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award percentage earned based on metric over the performance period           75.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award percentage attained           70.25%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period   28,205