Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Past Due Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 39,271	$ 19,701
Current	1,579,786	1,483,337
Non-accruing loans and leases	25,301	26,389
Total gross loans and leases receivable	$ 1,619,057	$ 1,503,038
30 to 59 days past due, percent of total portfolio	1.17%	0.20%
60 to 89 days past due, percent of total portfolio	0.16%	0.03%
Greater than 90 days past due, percent of portfolio	1.09%	1.09%
Past due, percent of total portfolio	2.42%	1.32%
Current, percent of total portfolio	97.58%	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	$ 5,820	$ 5,241
Current	197,656	195,146
Non-accruing loans and leases	5,663	7,021
Total gross loans and leases receivable	203,476	200,387
Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,303	0
Current	482,124	470,236
Non-accruing loans and leases	31	34
Total gross loans and leases receivable	484,427	470,236
Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	119	0
Current	42,547	40,154
Non-accruing loans and leases	2,213	2,626
Total gross loans and leases receivable	42,666	40,154
Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,824	3,068
Current	146,738	122,089
Non-accruing loans and leases	0	2,872
Total gross loans and leases receivable	161,562	125,157
Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	167,868	136,978
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	167,868	136,978
1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	423	1,444
Current	33,917	43,532
Non-accruing loans and leases	0	1,161
Total gross loans and leases receivable	34,340	44,976
Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	15,503	9,497
Current	446,818	419,505
Non-accruing loans and leases	17,104	12,321
Total gross loans and leases receivable	462,321	429,002
Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	33,170	30,787
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	33,170	30,787
Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Current	8,438	7,156
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	8,438	7,262
Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	279	345
Current	20,510	17,754
Non-accruing loans and leases	290	354
Total gross loans and leases receivable	20,789	18,099
Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	18,749	2,164
Current	1,575,007	1,474,485
Accruing loans and leases	1,593,756	1,476,649
Accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	157	0
Current	197,656	193,366
Accruing loans and leases	197,813	193,366
Accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,272	0
Current	482,124	470,202
Accruing loans and leases	484,396	470,202
Accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	40,453	37,528
Accruing loans and leases	40,453	37,528
Accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,824	196
Current	146,738	122,089
Accruing loans and leases	161,562	122,285
Accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	167,868	136,978
Accruing loans and leases	167,868	136,978
Accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	423	496
Current	33,917	43,319
Accruing loans and leases	34,340	43,815
Accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,073	1,366
Current	444,144	415,315
Accruing loans and leases	445,217	416,681
Accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	33,170	30,787
Accruing loans and leases	33,170	30,787
Accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Current	8,438	7,156
Accruing loans and leases	8,438	7,262
Accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	20,499	17,745
Accruing loans and leases	20,499	17,745
Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	20,522	17,537
Current	4,779	8,852
Non-accruing loans and leases	25,301	26,389
Non-accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,663	5,241
Current	0	1,780
Non-accruing loans and leases	5,663	7,021
Non-accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	31	0
Current	0	34
Non-accruing loans and leases	31	34
Non-accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	119	0
Current	2,094	2,626
Non-accruing loans and leases	2,213	2,626
Non-accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	2,872
Current	0	0
Non-accruing loans and leases	0	2,872
Non-accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	0	0
Non-accruing loans and leases	0	0
Non-accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	948
Current	0	213
Non-accruing loans and leases	0	1,161
Non-accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,430	8,131
Current	2,674	4,190
Non-accruing loans and leases	17,104	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-accruing 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-accruing loans and leases	0	0
Non-accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	279	345
Current	11	9
Non-accruing loans and leases	290	354
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	18,975	2,958
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	640	405
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,824	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	363	496
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,148	1,951
Financing Receivables, 30 to 59 Days Past Due [Member] \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Financing Receivables, 30 to 59 Days Past Due [Member] \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	16,170	1,771
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	157	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,824	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	363	496
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	826	1,169
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	106
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,805	1,187
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	483	405
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,322	782
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Non-accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,579	393
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,272	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
Financing Receivables, 60 to 89 Days Past Due [Member] \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	60	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	247	197
Financing Receivables, 60 to 89 Days Past Due [Member] \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,579	393
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,272	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	196
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	60	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	247	197
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Non-accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	17,717	16,350
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,180	4,836
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	31	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	119	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	2,872
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	948
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,108	7,349
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	279	345
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	17,717	16,350
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,180	4,836
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	31	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	119	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	2,872
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	948
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,108	7,349
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Non-accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 279	$ 345

Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Past Due Loans) (Details) - USD ($)
$ in Thousands

Dec. 31, 2018

Dec. 31, 2017

Financing Receivable, Recorded Investment, Aging [Abstract]

Total Past Due

$ 39,271

$ 19,701

Current

1,579,786

1,483,337

Non-accruing loans and leases

25,301