Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation and Cash-Based Incentive Compensation - Additional Information (Details)

v3.4.0.3
Share-Based Compensation and Cash-Based Incentive Compensation - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock available for award under plans 4,239,548      
Directors Compensation Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock available for award under plans 444,024      
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted 0      
Number of shares forfeited 46,293      
Performance based awards, percentage     100.00% 100.00%
Unrecognized share-based compensation expense $ 10,300,000      
Recognition period for unrecognized compensation expense 2017-11      
Restricted Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted 0 0    
Number of shares forfeited 0 0    
Number of shares vested 0 0    
Unrecognized share-based compensation expense $ 400,000      
Recognition period for unrecognized compensation expense 2018-04      
Cash-Based Incentive Awards | Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Adjusted EBITDA less interest expense $ 300,000,000