Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Employee Activity Non-vested Shares (Details)

v3.19.1
Share-Based Payments - Employee Activity Non-vested Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 3,047 $ 2,261
Employee Non-vested Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grants, vesting period (in years) 3 years  
Outstanding and non-vested, beginning of period (in shares) 315  
Stock Issued During Period, Shares, Restricted Stock Award, Gross 108  
Shares Vested in Period (114)  
Shares Forfeited in Period (2)  
Outstanding and non-vested, end of period (in shares) 307  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period $ 55  
Grants in Period, Weighted Average Grant Date Fair Value 59  
Vested in Period, Weighed-average grant date fair value 61  
Forfeited in period (in dollars per share) 54  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 58  
Outstanding and non-vested, aggregate grant date fair value $ 17,861  
Share-based compensation expense 2,042 1,399
Tax benefit related to share-based expense 486 360
Unrecognized share-based compensation, net of estimated forfeitures $ 15,251 $ 11,747
Weighted average period over which unrecognized compensation will be recognized (years) 2 years 1 month 11 days