XML 86 R69.htm IDEA: XBRL DOCUMENT v3.19.2
Stock-Based Compensation - Summary of Compensation Expense Recognized Related to all Stock-Based Awards (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Share-based Payment Arrangement [Abstract]        
Total stock-based compensation $ 3,351 $ 3,720 $ 6,786 $ 7,190