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Provision for Income Taxes - Provision for Income Taxes (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, 2018
Income Tax Disclosure [Abstract]
Expected tax expense, at the U.S. federal statutory income tax rate of 21%	$ 575	$ 1,354	$ 1,757	$ 2,431
State income taxes	97	224	294	403
FDII benefit	(4)	(29)	(32)	(148)	$ (98)
Other, net	6	6	11	10
Total provision for income taxes	$ 674	$ 1,555	$ 2,030	$ 2,696

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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