Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation (Schedule of Unvested Restricted Stock Units Activity) (Details)

v3.6.0.2
Share-Based Compensation (Schedule of Unvested Restricted Stock Units Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]      
Outstanding at the beginning of the period 1,416,000    
Granted 684,000 559,556 333,468
Vested (630,000)    
Forfeited (22,000)    
Outstanding at the end of the period 1,448,000 1,416,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding at the beginning of the period, Grant Date Fair Value per Share $ 6.94    
Granted, grant date fair value per share 12.63 $ 8.98 $ 9.67
Vested, grant date fair value per share 4.14    
Forfeited, grant date fair value per share 9.56    
Outstanding at the end of the period, grant date fair value per share $ 10.81 $ 6.94  
Weighted average period over which expense is expected to be recognized 1 year 7 months 6 days    
Fair value of shares vested   $ 5,425 $ 4,338
Market-based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]      
Granted 143,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Fair value of shares vested $ 2,608