Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Decrease in income tax expense	$ 2,052
Income tax expense	$ 1,474	$ 3,526	$ 4,059	$ 6,966
One time income tax adjustment related tax cuts and jobs act		$ 1,089
Federal income tax rate	31.30%	33.40%	28.20%	28.20%
Effective tax rate without adjustments		23.10%		23.80%

Effective income tax Rate continuing operations without adjustment.

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- Definition

One time income tax adjustment related tax cuts and jobs act of 2017.

+ References

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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