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Share-Based and Long-Term Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
May. 14, 2015
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   $ 3,500 $ 4,700  
Non-vested awards compensation expense not yet recognized   $ 8,800    
Non-vested awards compensation expense recognition period   1 year 6 months    
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted for stock options   0    
Weighted average price per share outstanding (dollars per share)   $ 4.18   $ 4.17
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   267,596    
Weighted average price per unit outstanding (dollars per share)   $ 14.88   16.03
Profits Interest Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   147,302    
Weighted average price per unit outstanding (dollars per share)   $ 8.58   9.26
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   0    
Weighted average price per unit outstanding (dollars per share)   $ 13.82   14.61
Deferred Incentive Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   0    
Weighted average price per unit outstanding (dollars per share)   $ 9.86   $ 16.63
2015 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional shares authorized 2,500,000      
2013 Equity Plan | Profits Interest Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   447,938    
Value of units outstanding   $ 3,800    
Weighted average price per unit outstanding (dollars per share)   $ 8.58    
2010 Equity Plan | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)   4 years    
Number of units granted (in shares)   5,426    
Value of units outstanding   $ 75    
Weighted average price per unit outstanding (dollars per share)   $ 13.82    
2010 Equity Plan | Deferred Incentive Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)   4 years    
Number of units granted (in shares)   575    
Value of units outstanding   $ 6    
Weighted average price per unit outstanding (dollars per share)   $ 9.86    
25% per Year in the First Four Years | 2013 Equity Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted for stock options   1,850,000    
Award vesting rights (in percent)   25.00%    
Number of options vested (in shares)   431,250    
Number of options remain unvested (in shares)   862,500    
Value of shares outstanding for stock options   $ 3,600    
Weighted average price per share outstanding (dollars per share)   $ 4.18    
25% per Year in the First Four Years | 2013 Equity Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   483,183    
Value of units outstanding   $ 8,800    
Weighted average price per unit outstanding (dollars per share)   $ 18.13    
Performance | 2013 Equity Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)   233,528    
Value of units outstanding   $ 1,900    
Weighted average price per unit outstanding (dollars per share)   $ 8.15    
Minimum | 2015 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)   3 years    
Minimum | Performance | 2015 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)   1 year