Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Non-employee Director Non-vested Shares (Details)

v3.10.0.1
Share-Based Payments - Non-employee Director Non-vested Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 2,417 $ 2,064 $ 4,678 $ 4,026
Nonemployee Director Nonvested Shares Granted Member        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-Employee Director Shares, Vesting Period (in years)     1 year  
Outstanding and non-vested, beginning of period (in shares)     11  
Grants in Period     15  
Shares Vested in Period     (12)  
Shares Forfeited in Period     0  
Outstanding and non-vested, end of period (in shares) 14   14  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period     $ 52  
Grants in Period, Weighted Average Grant Date Fair Value     58  
Vested in Period, Weighed-average grant date fair value     52  
Forfeited in Period, Weighted Average Grant Date Fair Value     0  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 58   $ 58  
Outstanding and non-vested, aggregate grant date fair value     $ 805  
Share-based compensation expense $ 166 146 351 317
Tax benefit related to share-based expense     88 115
Unrecognized share-based compensation, net of estimated forfeitures $ 703 $ 442 $ 703 $ 442
Weighted average period over which unrecognized compensation will be recognized (years)     10 months 11 days