Quarterly report pursuant to Section 13 or 15(d)

Equity - Class A Common Stock (Detail)

v3.7.0.1
Equity - Class A Common Stock (Detail) - Class A Common Stock - shares
1 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Class Of Stock [Line Items]        
Common stock, shares outstanding 8,100,205 8,074,197 8,028,000 7,990,000
Issuance of Class A common Stock upon conversion of Class B units to Class A common stock 26,008      
Common stock conversion date Mar. 31, 2017