Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 1,237,000	$ 1,144,000	$ 3,984,000	$ 3,781,000
Effective income tax rate	23.60%	24.70%	24.10%	26.50%
Unrealized tax benefits	$ 0	$ 0	$ 0	$ 0