Annual report pursuant to Section 13 and 15(d)

Stock-based and Long-Term Compensation - Narrative (Details)

v3.7.0.1
Stock-based and Long-Term Compensation - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares) 0 0 0
Exercisable options, intrinsic value $ 0    
Options outstanding, weighted average remaining contractual term 1 year 3 months 4 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 0    
Options exercisable, weighted average remaining contractual term 1 year 2 months 26 days    
Employee Stock Option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award expiration period 5 years    
Award vesting period 2 years    
Employee Stock Option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award expiration period 7 years    
Award vesting period 4 years    
Restricted Stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 2 years    
Restricted Stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Restricted Stock and Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost not yet recognized $ 4,158,000    
Compensation cost not yet recognized, period for recognition 3 years 3 months