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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 01, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 19,580	$ 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	$ 13,272
Customer lists | RIG
Finite-Lived Intangible Assets [Line Items]
Amortization period		10 years
Gross carrying amount of intangible asset		$ 7,263
Accumulated amortization of intangible asset		$ 6,514
Customer lists | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period		8 years
Customer lists | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period		13 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]
Amortization period	10 years	10 years
Gross carrying amount of intangible asset		$ 2,418
Accumulated amortization of intangible asset		$ 539

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