Quarterly report pursuant to Section 13 or 15(d)

Investments and Fair Value Measurements - Additional Information (Detail)

v3.7.0.1
Investments and Fair Value Measurements - Additional Information (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Investments $ 13 $ 335
Maximum    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Maximum financial interest in affiliated investment funds 2.00%