Basis of Presentation - Additional Information (Detail) $ / shares in Units, $ in Thousands	Jan. 24, 2017 USD ($) $ / shares shares	Jul. 20, 2016 shares	Jun. 21, 2016	Apr. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)
Accounting Policies [Line Items]
Stock split			49.313
Gross offering costs | $	$ 1,166			$ 658	$ 508
Proceeds from public offering | $	$ 373,570
IPO [Member]
Accounting Policies [Line Items]
Issuance of stock (in shares)		21,390,000
Issuance of stock (in shares)		11,090,000
Over Allotment Option [Member]
Accounting Policies [Line Items]
Issuance of stock (in shares)	1,875,000
Oaktree [Member]
Accounting Policies [Line Items]
Control percentage by Oaktree				42.00%
Oaktree [Member] | Secondary Public Offering [Member]
Accounting Policies [Line Items]
Issuance of stock (in shares)	14,375,000
Price of shares issued (in dollars per share) | $ / shares	$ 27.00