Shareholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands			3 Months Ended	6 Months Ended
	May 19, 2020 shares	May 15, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2020 USD ($) Vote shares	Dec. 31, 2019 shares
Class of Stock [Line Items]
Preferred stock, issued (in shares)			0	0	0
Preferred stock, outstanding (in shares)			0	0	0
Value of capital stock issuance | $			$ 411,523	$ 411,523
Over-Allotment Option
Class of Stock [Line Items]
Shares issued and sold (in shares)	800,000
Class A Common Stock
Class of Stock [Line Items]
Common stock holders voting right | Vote				1
Conversion of common stock conversion ratio				1
Class B Common Stock
Class of Stock [Line Items]
Common stock holders voting right | Vote				10
Class C Capital Stock
Class of Stock [Line Items]
Shares issued and sold (in shares)		8,000,000
Shares issued		753,936
Shares issued (usd per share) | $ / shares		$ 48.00
Value of capital stock issuance | $		$ 36,200
Shares received in unwinding of capped call transactions		317,865
Value based on trading price of Class C capital stock at time of unwind | $		$ 14,800
Class C Capital Stock | Public Stock Offering
Class of Stock [Line Items]
Shares issued and sold (in shares)		8,800,000
Public offering price (usd per share) | $ / shares		$ 48.00
Net proceeds from public offering | $		$ 411,500