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Equity Awards - Restricted Shares Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted shares issued related to director fee deferrals     8,650    
Restricted Shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Unvested Restricted Shares Granted     529,171    
Unrecognized unvested restricted shares-based compensation expense $ 12,500   $ 12,500    
Weighted-average period for recognition of the unrecognized unvested restricted shares-based compensation expense     2 years 1 month    
Restricted shares-based compensation expense $ 2,200 $ 900 $ 4,100 $ 2,900  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period     88,611    
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     235,251    
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     42,740    
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     2,400    
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     41,174    
Plan 8 [Member] | Performance-based restriced shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Unvested Restricted Shares Granted 198,956        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.96%        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 35.80%        
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    
Total shareholder return metric [Member] | Minimum [Member] | Plan 8 [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 0.00%        
Total shareholder return metric [Member] | Maximum [Member] | Plan 8 [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 200.00%        
EPS CAGR and cash generation metric [Member] | Plan 3 [Member] | Performance-based restriced shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award percentage attained         50.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period     35,850