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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ (698) $ 2,352
Stock options granted 653,000  
Performance-based restricted stock units granted 490,000  
Time-vesting restricted stock units granted 466,000  
Expected volatility rate, minimum 43.75%  
Expected volatility rate, maximum 52.01%  
Risk free interest rate, minimum 1.54%  
Risk free interest rate, maximum 2.07%  
Expected dividend yield, minimum 2.84%  
Expected dividend yield, maximum 3.85%  
Expected life, minimum 3 years 6 months  
Expected life, maximum 5 years 9 months  
Weighted average exercise price of options granted $ 8.98  
Weighted average grant date fair value of options granted 2.73  
Weighted average grant date fair value of restricted stock units granted $ 9.00  
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used Black-Scholes  
Performance-based restricted stock units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used Monte Carlo