Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Share-Based Payments - Employee Activity Non-vested Shares (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
$ / shares
shares
Jun. 30, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense | $ $ 6,244 $ 4,678
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) | shares 315  
Stock Issued During Period, Shares, Restricted Stock Award, Gross | shares 111  
Shares Vested in Period | shares (116)  
Shares Forfeited in Period | shares (5)  
Outstanding and non-vested, end of period (in shares) | shares 305  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period | $ / shares $ 55  
Grants in Period, Weighted Average Grant Date Fair Value | $ / shares 59  
Vested in Period, Weighed-average grant date fair value | $ / shares 61  
Forfeited in period (in dollars per share) | $ / shares 55  
Outstanding and non-vested, weighted-average grant date fair value, end of period | $ / shares $ 58  
Outstanding and non-vested, aggregate grant date fair value | $ $ 17,779  
Share-based compensation expense | $ 4,142 2,965
Tax benefit related to share-based expense | $ 1,056 741
Unrecognized share-based compensation, net of estimated forfeitures | $ $ 13,192 $ 13,371
Weighted average period over which unrecognized compensation will be recognized (years) 2 years