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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2020
Income Taxes [Line Items]
Income tax expense	$ 7,556	$ 13,637	$ 15,073	$ 27,233
Effective tax rate	27.50%	26.80%	27.40%	26.00%
Deferred tax assets, valuation allowance	$ 200		$ 200
Statutory Effective Tax Rate [Member]
Income Taxes [Line Items]
U.S. federal statutory rate			21.00%
State income tax rate, net of federal benefit			3.70%
Forecast [Member]
Income Taxes [Line Items]
Effective tax rate					27.20%