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Income Taxes - Narrative (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Contingency [Line Items]
Income tax expense	$ 4,442,023	$ 5,017,185	$ 10,304,756	$ 8,719,285
Effective tax rate			23.40%	23.80%
Federal statutory income tax rate, percent			21.00%	21.00%
Parent Company
Income Tax Contingency [Line Items]
Effective tax rate			25.50%

X

- 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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