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Stock-Based Compensation (Textual) (Details)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2010
shares
Stock options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, stock options $ 2.7      
Percent of voting interests 10.00%      
Purchase price of common stock above minimum threshold 110.00%      
Expiration period 10 years      
Award vesting period 4 years      
Stock options [Member] | One Year Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 25.00%      
Stock options [Member] | Monthly, Three Year Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 75.00%      
RSAs and RSUs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, share-based awards other than options $ 2.2      
Restricted Stock Units (RSUs) [Member] | Monthly, Three Year Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Award vesting rights 33.33%      
Restricted Stock Units (RSUs) [Member] | Annually, Four Year Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 4 years      
Award vesting rights 25.00%      
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 1 year      
Performance awards, threshold level, number of shares, multiplier     0.5  
Performance awards, superior level, number of shares, multiplier 2      
Performance Shares [Member] | Annually, Two Year Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 2 years      
Performance stock units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, share-based awards other than options $ 2.4      
2010 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares reserved for future issuance (shares) | shares       1,100,000
2016 PSU Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated percent of performance goals that will be achieved 100.00%      
2015 PSU Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Goals achieved percent 92.80%      
2014 PSU Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Goals achieved percent   53.00%    
Minimum [Member] | Incentive Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Purchase price of common stock 100.00%      
Minimum [Member] | Non-Statutory Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Purchase price of common stock 85.00%