Description of Business - Additional Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended
	Feb. 06, 2017 $ / shares shares	Jan. 31, 2017	Jun. 30, 2017 USD ($) shares	Dec. 31, 2016 shares
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			0	175,000,000
Reverse stock split		0.25
Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			700,000,000
IPO | Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)	700,000,000
Shares sold in initial public offering (in shares)	35,000,000
Sale of common stock in IPO (in dollars per share) | $ / shares	$ 14.00
Net proceeds from initial public offering | $			$ 456,561