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Equity-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized common stock	8,200,000
Equity incentive plan available for future grant	2,903,059
Annual increments in employee grants	25.00%
Stock options, contractual term	10 years
Equity-based compensation expense	$ 17,307,000	$ 22,001,000	$ 23,467,000
Vesting targets	(6,400,000)	(5,500,000)	(5,700,000)
Unrecognized compensation expense related to unvested options	$ 34,300,000
Vesting period	1 year 2 months 12 days
Warrant outstanding	$ 0
Deferred income tax benefit	1,780,000	(9,714,000)	$ 31,372,000
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred income tax benefit	$ 4,200,000	$ 7,000,000.0
Restricted Stock Award [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock Award [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Number of shares issuable at the end of the vesting period, percentage	0.00%
Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Number of shares issuable at the end of the vesting period, percentage	200.00%

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