Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Property and Equipment [Line Items]
Computer software development costs capitalized	$ 13,700	$ 11,000	$ 26,000	$ 20,700
Interest costs incurred	300	400	700	800
Interest costs capitalized	300	400	700	800
Retainage amount included in construction in progress	3,900		3,900		$ 3,500
Depreciation and amortization	8,380	6,774	16,096	13,059
Property and Equipment [Member]
Property and Equipment [Line Items]
Depreciation and amortization	$ 15,600	$ 13,000	$ 30,500	$ 25,200