Income Taxes - Narrative (Details) - USD ($)			1 Months Ended	12 Months Ended
	Jan. 01, 2020	Dec. 15, 2017	Jun. 30, 2010	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Income Tax Contingency [Line Items]
Income tax expense (benefit)					$ (2,500,000)
Increase in deferred tax assets related to purchase accounting adjustments					611,000
Reserves for uncertain tax positions				$ 0	$ 0	$ 0
Operating loss carryforwards				30,900,000
Unrecognized tax benefits, increase resulting from acquisition			$ 2,500,000
Cumulative Effect, Period of Adoption, Adjustment
Income Tax Contingency [Line Items]
Income tax credit	$ 745,000
Royal Bancshares of Pennsylvania, Inc.
Income Tax Contingency [Line Items]
Operating loss carryforwards, additional utilization, acquired from business combination		$ 5,000,000.0
Deferred Tax Assets for State Net Operating Losses
Income Tax Contingency [Line Items]
Deferred tax assets, valuation allowance				515,000
Unrealized Capital Losses For Partnership Investments
Income Tax Contingency [Line Items]
Deferred tax assets, valuation allowance				606,000
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Operating loss carryforwards, annual limitation				$ 2,700,000
Alternative minimum tax credit carry forward		559,000
Internal Revenue Service (IRS) | Royal Bancshares of Pennsylvania, Inc.
Income Tax Contingency [Line Items]
Alternative minimum tax credit carry forward		$ 532,000