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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Past Due Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 18,496	$ 19,701
Current	1,581,613	1,483,337
Non-accrual loans and leases	30,613	26,389
Total gross loans and leases receivable	$ 1,600,109	$ 1,503,038
30 to 59 days past due, percent of total portfolio	0.39%	0.20%
60 to 89 days past due, percent of total portfolio	0.01%	0.03%
Greater than 90 days past due, percent of portfolio	0.76%	1.09%
Past due, percent of total portfolio	1.16%	1.32%
Current, percent of total portfolio	98.84%	98.68%
Gross loans, percent of total portfolio	100.00%	100.00%
Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 2,781	$ 5,241
Current	200,952	195,146
Non-accrual loans and leases	10,470	7,021
Total gross loans and leases receivable	203,733	200,387
Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	774	0
Current	487,068	470,236
Non-accrual loans and leases	32	34
Total gross loans and leases receivable	487,842	470,236
Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	121	0
Current	44,888	40,154
Non-accrual loans and leases	2,257	2,626
Total gross loans and leases receivable	45,009	40,154
Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,879	3,068
Current	130,392	122,089
Non-accrual loans and leases	1,879	2,872
Total gross loans and leases receivable	132,271	125,157
Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	174,664	136,978
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	174,664	136,978
1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	529	1,444
Current	35,200	43,532
Non-accrual loans and leases	568	1,161
Total gross loans and leases receivable	35,729	44,976
Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,121	9,497
Current	445,811	419,505
Non-accrual loans and leases	14,956	12,321
Total gross loans and leases receivable	457,932	429,002
Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	31,090	30,787
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	31,090	30,787
Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Current	8,388	7,156
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	8,388	7,262
Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	291	345
Current	23,160	17,754
Non-accrual loans and leases	451	354
Total gross loans and leases receivable	23,451	18,099
Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,801	2,164
Current	1,566,695	1,474,485
Accrual loans and leases	1,569,496	1,476,649
Accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	115	0
Current	193,148	193,366
Accrual loans and leases	193,263	193,366
Accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	742	0
Current	487,068	470,202
Accrual loans and leases	487,810	470,202
Accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	42,752	37,528
Accrual loans and leases	42,752	37,528
Accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
Current	130,392	122,089
Accrual loans and leases	130,392	122,285
Accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	174,664	136,978
Accrual loans and leases	174,664	136,978
Accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	496
Current	35,161	43,319
Accrual loans and leases	35,161	43,815
Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,944	1,366
Current	441,032	415,315
Accrual loans and leases	442,976	416,681
Accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	31,090	30,787
Accrual loans and leases	31,090	30,787
Accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Current	8,388	7,156
Accrual loans and leases	8,388	7,262
Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	23,000	17,745
Accrual loans and leases	23,000	17,745
Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	15,695	17,537
Current	14,918	8,852
Non-accrual loans and leases	30,613	26,389
Non-accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,666	5,241
Current	7,804	1,780
Non-accrual loans and leases	10,470	7,021
Non-accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32	0
Current	0	34
Non-accrual loans and leases	32	34
Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	121
Current	2,136	2,626
Non-accrual loans and leases	2,257	2,626
Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,879	2,872
Current	0	0
Non-accrual loans and leases	1,879	2,872
Non-accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	0	0
Non-accrual loans and leases	0	0
Non-accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	529	948
Current	39	213
Non-accrual loans and leases	568	1,161
Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	10,177	8,131
Current	4,779	4,190
Non-accrual loans and leases	14,956	12,321
Non-accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	0	0
Non-accrual loans and leases	0	0
Non-accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	0	0
Non-accrual loans and leases	0	0
Non-accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	291	345
Current	160	9
Non-accrual loans and leases	451	354
30-59 days past due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6,194	2,958
30-59 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,144	405
30-59 days past due | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	742	0
30-59 days past due | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	496
30-59 days past due | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,308	1,951
30-59 days past due | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
30-59 days past due | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,686	1,771
30-59 days past due | Accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	742	0
30-59 days past due | Accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	496
30-59 days past due | Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,944	1,169
30-59 days past due | Accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
30-59 days past due | Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,508	1,187
30-59 days past due | Non-accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,144	405
30-59 days past due | Non-accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,364	782
30-59 days past due | Non-accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
30-59 days past due | Non-accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	158	393
60-89 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	115	0
60-89 days past due | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
60-89 days past due | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	43	197
60-89 days past due | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	115	393
60-89 days past due | Accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	115	0
60-89 days past due | Accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
60-89 days past due | Accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	197
60-89 days past due | Accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	43	0
60-89 days past due | Non-accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	43	0
60-89 days past due | Non-accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
60-89 days past due | Non-accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,144	16,350
Greater than 90 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,522	4,836
Greater than 90 days past due | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32	0
Greater than 90 days past due | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	121	0
Greater than 90 days past due | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,879	2,872
Greater than 90 days past due | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	529	948
Greater than 90 days past due | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,770	7,349
Greater than 90 days past due | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	291	345
Greater than 90 days past due | Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,144	16,350
Greater than 90 days past due | Non-accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,522	4,836
Greater than 90 days past due | Non-accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32	0
Greater than 90 days past due | Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	121	0
Greater than 90 days past due | Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,879	2,872
Greater than 90 days past due | Non-accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Non-accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	529	948
Greater than 90 days past due | Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,770	7,349
Greater than 90 days past due | Non-accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Non-accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Non-accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 291	$ 345

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- Definition

Financing Receivable, Recorded Investment, 30 to 59 Days Past Due, Percent of Portfolio

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Financing Receivable, Recorded Investment, Past Due, Percent of Portfolio

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes 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 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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