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Stock-Based Compensation (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
plan
$ / shares
shares
Mar. 31, 2016
USD ($)
Dec. 31, 2016
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense | $ $ 0 $ 200,000  
Number of share-based compensation plans | plan 4    
Number of shares available for grant (in shares) | shares 0    
Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense | $ $ 0    
Expiration term 5 years    
Number of awards outstanding (in shares) | shares 200,000   200,000
Stock Appreciation Rights (SARs) | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards vested 50.00%    
Number of average consecutive trading days required at trigger stock price 30 days    
Minimum stock price required to trigger award vesting (in dollars per share) | $ / shares $ 80    
Stock Appreciation Rights (SARs) | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards vested 50.00%    
Number of average consecutive trading days required at trigger stock price 30 days    
Minimum stock price required to trigger award vesting (in dollars per share) | $ / shares $ 120    
Stock Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense | $ $ 100,000 $ 200,000  
Stock Incentive Plan 2011      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) | shares 185,755