Allowance for Loan and Lease Losses - Allocation of Allowance For Loan and Lease Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance	$ 43,410	$ 39,771
Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	3,762	441
Collectively evaluated for impairment	39,559	39,245
Ending balance	43,321	39,686	$ 35,598
Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	25
Collectively evaluated for impairment	89	60
Ending balance	89	85	157
Commercial and industrial \| Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	397	441
Collectively evaluated for impairment	10,820	11,371
Ending balance	11,217	11,812	9,389
Commercial and industrial \| Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	25
Collectively evaluated for impairment	55	0
Ending balance	55	25	0
Commercial real estate \| Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	3,365	0
Collectively evaluated for impairment	20,118	20,412
Ending balance	23,483	20,412	19,836
Commercial real estate \| Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Ending balance	0	0	97
Residential real estate \| Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	7,317	6,161
Ending balance	7,317	6,161	5,149
Residential real estate \| Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	28	54
Ending balance	28	54	54
Consumer and other \| Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,304	1,301
Ending balance	1,304	1,301	1,224
Consumer and other \| Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	6	6
Ending balance	6	6	6
Finance Leases \| Originated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Ending balance	0	0	0
Finance Leases \| Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Ending balance	$ 0	$ 0	$ 0

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
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-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

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