Income Taxes - Textual (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
U.S. federal | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Open tax year	2016
State | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Open tax year	2016
Metropolitan
Operating Loss Carryforwards [Line Items]
Net operating losses		$ 74.7
Reliance Bancshares, Inc.
Operating Loss Carryforwards [Line Items]
Net operating losses			$ 44.2