Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock options expiration, description	Options may be exercised, in whole or in part, at any time after becoming exercisable, but not later than the date the Option expires, which is typically ten years from the original grant date
Options expiration period	10 years
Options, granted	0
Stock compensation expense	$ 1.7	$ 2.8