Loans Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 18,586	$ 17,012
Charge-offs	(370)	(270)
Recoveries	95	116
Provision	746	358
Allowance for Loan Losses, Ending Balance	19,057	17,216
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	192	34	$ 106
Allowance for loan losses - Loans Collectively Evaluated for Impairment	18,865	17,182	18,480
Ending Loan Balance - Individually Evaluated for Impairment	2,959	2,066	3,683
Ending Loan Balance - Collectively Evaluated for Impairment	1,990,078	1,808,739	1,947,087
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	1,873	1,017
Charge-offs	(16)	(16)
Recoveries	0	7
Provision	311	(69)
Allowance for Loan Losses, Ending Balance	2,168	939
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	92	0	94
Allowance for loan losses - Loans Collectively Evaluated for Impairment	2,076	939	1,779
Ending Loan Balance - Individually Evaluated for Impairment	489	0	489
Ending Loan Balance - Collectively Evaluated for Impairment	127,185	118,841	128,760
Commercial Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,504	5,677
Charge-offs	1	0
Recoveries	9	0
Provision	(151)	(228)
Allowance for Loan Losses, Ending Balance	4,363	5,449
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	42	34	2
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,321	5,415	4,502
Ending Loan Balance - Individually Evaluated for Impairment	815	884	1,537
Ending Loan Balance - Collectively Evaluated for Impairment	454,243	434,432	442,711
Consumer Loans Financing
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	7,604	6,120
Charge-offs	(347)	(254)
Recoveries	86	109
Provision	676	727
Allowance for Loan Losses, Ending Balance	8,019	6,702
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	8,019	6,702	7,604
Ending Loan Balance - Individually Evaluated for Impairment	91	88	95
Ending Loan Balance - Collectively Evaluated for Impairment	626,549	551,876	602,732
Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,605	4,198
Charge-offs	(8)	0
Recoveries	0	0
Provision	(90)	(72)
Allowance for Loan Losses, Ending Balance	4,507	4,126
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	58	0	10
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,449	4,126	4,595
Ending Loan Balance - Individually Evaluated for Impairment	1,564	1,094	1,562
Ending Loan Balance - Collectively Evaluated for Impairment	$ 782,101	$ 703,590	$ 772,884

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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- Definition

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

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- Definition

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

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Amount of direct write-downs of financing receivables charged against the allowance.

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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