Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 27, 2019	Apr. 11, 2018	Jul. 13, 2017
Schedule Of Capitalization Equity [Line Items]
Common stock, voting rights	Class B common stock is entitled to ten votes per share as compared to one vote per share for the Class A common stock
Cash dividend paid per share	$ 0.10	$ 0.13
Aggregate amount of cash dividends paid	$ 8,500,000	$ 10,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Amount approved under share purchase				$ 45,000,000.0	$ 30,000,000.0	$ 15,000,000.0
Aggregate purchase price of repurchased shares	$ 32,200,000	$ 525,000	$ 12,565,000
Class A common stock
Schedule Of Capitalization Equity [Line Items]
Amount approved under share purchase				$ 15,000,000.0	$ 15,000,000.0
Number of shares repurchased	8,600,000	300,000	3,800,000
Average price of repurchased shares	$ 3.76	$ 2.02	$ 3.30
Aggregate purchase price of repurchased shares		$ 500,000	$ 12,600,000