Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 11, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jul. 01, 2017	Jan. 05, 2005
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 42,108	$ 19,580	$ 19,580
RIG
Finite-Lived Intangible Assets [Line Items]
Goodwill						$ 6,308
New Windsor
Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 13,272
Frederick County Bancorp, Inc.
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 22,528
Customer lists | RIG
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of intangible asset		10,432
Accumulated amortization of intangible asset		$ 7,082
Customer lists | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period		15 years
Customer lists | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period		8 years
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Amortization period		10 years
Core deposit intangibles | New Windsor
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of intangible asset		$ 2,418			$ 2,418
Accumulated amortization of intangible asset		1,264
Core deposit intangibles | Frederick County Bancorp, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortization period	10 years
Gross carrying amount of intangible asset	$ 3,560	3,560
Accumulated amortization of intangible asset		$ 486