XML 86 R59.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock-Based Compensation (Detail) - (Table 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Total $ 23,170 $ 21,076 $ 20,847
Restricted Stock [Member]      
Allocated Share-based Compensation Expense 19,143 16,720 16,616
Stock Options [Member]      
Allocated Share-based Compensation Expense $ 4,027 $ 4,356 $ 4,231