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Stock-Based Compensation (Details)
3 Months Ended
Mar. 31, 2016
USD ($)
plan
$ / shares
shares
Mar. 31, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of share-based compensation plans | plan 4  
Stock-based compensation expense | $ $ 200,000 $ 900,000
Stock Appreciation Rights (SARs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award expiration term 5 years  
Number of awards outstanding (in shares) | shares 1,200,000  
Stock-based compensation expense | $ $ 0  
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 $ 8  
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 $ 12  
Stock Incentive Plan 2011    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for grant (in shares) | shares 537,454