XML 99 R87.htm IDEA: XBRL DOCUMENT v3.10.0.1
Incentive Plans - Summary of Impact of LFI and Other Similar Deferred Compensation Arrangements (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share Based Compensation [Abstract]        
Amortization, net of forfeitures $ 36,293 $ 28,310 $ 52,129 $ 41,293
Change in the fair value of underlying investments (499) 5,753 (1,935) 13,106
Total $ 35,794 $ 34,063 $ 50,194 $ 54,399