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Income Taxes - Narrative (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Income tax expense	$ 4,062,849	$ 5,726,807	$ 14,367,605	$ 14,446,092
Effective tax rate			24.10%	24.60%
Federal statutory income tax rate, percent			21.00%	21.00%
Parent Company
Income Tax Contingency [Line Items]
Effective tax rate			25.70%	25.30%

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- Definition

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

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

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