XML 105 R82.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity-Based Compensation (Summary of Compensation Expense Connection with Awards) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expense recognized under the Prior Plan $ 569 $ 1,059 $ 1,937
Expense recognized under the Non-Employee Directors Plan 444 420 443
Total stock compensation expense 9,189 7,122 6,373
Tax benefits recognized related to stock compensation expense 2,509 2,133 2,485
2015 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expense recognized under the Plan 7,988 5,643 3,993
2018 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expense recognized under the Plan $ 188 $ 0 $ 0