Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Share-Based Payments - Non-employee Director Non-vested Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 6,244 $ 4,678
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) 15  
Grants in Period 15  
Shares Vested in Period (15)  
Outstanding and non-vested, end of period (in shares) 15  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period $ 59  
Grants in Period, Weighted Average Grant Date Fair Value 62  
Vested in Period, Weighed-average grant date fair value 59  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 62  
Outstanding and non-vested, aggregate grant date fair value $ 920  
Share-based compensation expense 483 351
Tax benefit related to share-based expense 123 88
Unrecognized share-based compensation, net of estimated forfeitures $ 784 $ 703
Weighted average period over which unrecognized compensation will be recognized (years) 10 months 24 days