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Stockholders' Equity (Details) - $ / shares
1 Months Ended 12 Months Ended
Dec. 23, 2016
Aug. 31, 2017
May 31, 2017
Feb. 28, 2017
Dec. 31, 2017
Dec. 31, 2016
Class of Stock [Line Items]            
Common stock, authorized (in shares)         80,000,000 80,000,000
Common stock, par value (in dollars per share)         $ 0.01 $ 0.01
Common stock, issued (in shares)         26,371,572 26,095,431
Common stock, outstanding (in shares)         26,219,129 25,998,844
Shares granted (in shares)         860,402  
Shares repurchased (in shares)         152,443 96,587
Preferred stock, authorized (in shares)         5,000,000 5,000,000
Preferred stock, par value (in dollars per share)         $ 0.01 $ 0.01
Preferred stock, issued (in shares)         0  
Preferred stock, outstanding (in shares)         0 0
Performance Based RSUs            
Class of Stock [Line Items]            
Shares granted (in shares)       801,322    
Vesting period       3 years    
Performance Shares            
Class of Stock [Line Items]            
Non options granted (in shares)   6,476   320,532    
Vesting period       3 years    
Stock options            
Class of Stock [Line Items]            
Non options granted (in shares)   6,476        
Vesting period         3 years  
Restricted Stock Units            
Class of Stock [Line Items]            
Shares granted (in shares) 809,416 16,190 26,700      
Restricted Stock Units | Share-based Compensation Award, Tranche One            
Class of Stock [Line Items]            
Awards vesting percentage 33.33%          
Restricted Stock Units | Share-based Compensation Award, Tranche Two            
Class of Stock [Line Items]            
Awards vesting percentage 66.67%          
Vesting period 2 years