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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	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 19,106	$ 19,701
Current	1,546,055	1,483,337
Non-accrual loans and leases	20,030	26,389
Total gross loans and leases receivable	$ 1,565,161	$ 1,503,038
30 to 59 days past due, percent of total portfolio	0.40%	0.20%
60 to 89 days past due, percent of total portfolio	0.00%	0.03%
Greater than 90 days past due, percent of portfolio	0.82%	1.09%
Past due, percent of total portfolio	1.22%	1.32%
Current, percent of total portfolio	98.78%	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	$ 3,915	$ 5,241
Current	193,353	195,146
Non-accrual loans and leases	3,978	7,021
Total gross loans and leases receivable	197,268	200,387
Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	421	0
Current	483,730	470,236
Non-accrual loans and leases	33	34
Total gross loans and leases receivable	484,151	470,236
Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	46,379	40,154
Non-accrual loans and leases	2,517	2,626
Total gross loans and leases receivable	46,379	40,154
Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,000	3,068
Current	154,020	122,089
Non-accrual loans and leases	2,000	2,872
Total gross loans and leases receivable	156,020	125,157
Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	136,098	136,978
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	136,098	136,978
1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,236	1,444
Current	40,630	43,532
Non-accrual loans and leases	733	1,161
Total gross loans and leases receivable	41,866	44,976
Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	11,088	9,497
Current	431,917	419,505
Non-accrual loans and leases	10,453	12,321
Total gross loans and leases receivable	443,005	429,002
Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	31,387	30,787
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	31,387	30,787
Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	129	106
Current	8,141	7,156
Non-accrual loans and leases	0	0
Total gross loans and leases receivable	8,270	7,262
Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	317	345
Current	20,400	17,754
Non-accrual loans and leases	316	354
Total gross loans and leases receivable	20,717	18,099
Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,681	2,164
Current	1,542,450	1,474,485
Accrual loans and leases	1,545,131	1,476,649
Accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	193,290	193,366
Accrual loans and leases	193,290	193,366
Accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	388	0
Current	483,730	470,202
Accrual loans and leases	484,118	470,202
Accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	43,862	37,528
Accrual loans and leases	43,862	37,528
Accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
Current	154,020	122,089
Accrual loans and leases	154,020	122,285
Accruing loans and leases | Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	136,098	136,978
Accrual loans and leases	136,098	136,978
Accruing loans and leases | 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	545	496
Current	40,588	43,319
Accrual loans and leases	41,133	43,815
Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,618	1,366
Current	430,934	415,315
Accrual loans and leases	432,552	416,681
Accruing loans and leases | Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	31,387	30,787
Accrual loans and leases	31,387	30,787
Accruing loans and leases | Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	129	106
Current	8,141	7,156
Accrual loans and leases	8,270	7,262
Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1	0
Current	20,400	17,745
Accrual loans and leases	20,401	17,745
Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	16,425	17,537
Current	3,605	8,852
Non-accrual loans and leases	20,030	26,389
Non-accruing loans and leases | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,915	5,241
Current	63	1,780
Non-accrual loans and leases	3,978	7,021
Non-accruing loans and leases | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	33	0
Current	0	34
Non-accrual loans and leases	33	34
Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0
Current	2,517	2,626
Non-accrual loans and leases	2,517	2,626
Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,000	2,872
Current	0	0
Non-accrual loans and leases	2,000	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	691	948
Current	42	213
Non-accrual loans and leases	733	1,161
Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	9,470	8,131
Current	983	4,190
Non-accrual loans and leases	10,453	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	316	345
Current	0	9
Non-accrual loans and leases	316	354
30-59 days past due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6,231	2,958
30-59 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	395	405
30-59 days past due | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	421	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	707	496
30-59 days past due | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,578	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	129	106
30-59 days past due | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1	0
30-59 days past due | Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,681	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	388	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	545	496
30-59 days past due | Accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,618	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	129	106
30-59 days past due | Accruing loans and leases | Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1	0
30-59 days past due | Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,550	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	395	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	33	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	162	0
30-59 days past due | Non-accruing loans and leases | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,960	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	0	393
60-89 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	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	0	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	0	393
60-89 days past due | 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 | 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	0	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	0	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	12,875	16,350
Greater than 90 days past due | Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,520	4,836
Greater than 90 days past due | Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,000	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	6,510	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	316	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	12,875	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	3,520	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	0	0
Greater than 90 days past due | Non-accruing loans and leases | Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Greater than 90 days past due | Non-accruing loans and leases | Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,000	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	6,510	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	$ 316	$ 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, 60 to 89 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://www.xbrl.org/2003/role/presentationRef
-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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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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- 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://www.xbrl.org/2003/role/presentationRef
-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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