Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Tax cuts and jobs act of 2017, one-time non-cash write-down of net deferred tax assets			$ 3,900,000
Federal tax rate	21.00%	21.00%	35.00%
Tax rate deferred tax assets were measured	27.86%	28.11%
Deferred tax assets, valuation allowance	$ 0	$ 0
Unrecognized tax benefits	0	0
Tax benefit resulting from share based compensation	733,000	729,000	$ 427,000
Accounting Standards Update 2016-09
Income Taxes [Line Items]
Tax benefit resulting from share based compensation	$ 199,000	$ 225,000	$ 221,000
Federal Income Tax | Earliest Tax Year
Income Taxes [Line Items]
Income tax returns year open and subject to examination	2016
State Income Tax | Earliest Tax Year
Income Taxes [Line Items]
Income tax returns year open and subject to examination	2016