Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Data - Components of Deferred Compensation and Commissions (Detail)

v3.7.0.1
Selected Balance Sheet Data - Components of Deferred Compensation and Commissions (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Stock appreciation rights ("SARs") liability $ 1,734 $ 1,366
Commissions payable to investment sales and financing professionals 27,802 42,781
Deferred compensation liability 913 607
Total 30,449 44,754
Stock appreciation rights ("SARs") liability 19,681 20,949
Commissions payable to investment sales and financing professionals 12,917 17,101
Deferred compensation liability 7,525 6,405
Total $ 40,123 $ 44,455