Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Past Due Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 19,701	$ 16,756
Current	1,483,337	1,435,108
Non-accruing loans and leases	26,389	25,194
Total gross loans and leases receivable	$ 1,503,038	$ 1,451,864
30 to 59 days past due, percent of total portfolio	0.20%	0.42%
60 to 89 days past due, percent of total portfolio	0.03%	0.04%
Greater than 90 days past due, percent of portfolio	1.09%	0.69%
Past due, percent of total portfolio	1.32%	1.15%
Current, percent of total portfolio	98.68%	98.85%
Gross loans, percent of total portfolio	100.00%	100.00%
Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 5,241	$ 1,183
Current	195,146	175,276
Non-accruing loans and leases	7,021	2,223
Total gross loans and leases receivable	200,387	176,459
Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	470,236	473,158
Non-accruing loans and leases	34	1,609
Total gross loans and leases receivable	470,236	473,158
Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	40,154	56,638
Non-accruing loans and leases	2,626	3,440
Total gross loans and leases receivable	40,154	56,638
Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,068	2,918
Current	122,089	98,288
Non-accruing loans and leases	2,872	2,918
Total gross loans and leases receivable	125,157	101,206
Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	136,978	92,762
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	136,978	92,762
1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,444	1,315
Current	43,532	44,336
Non-accruing loans and leases	1,161	1,937
Total gross loans and leases receivable	44,976	45,651
Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	9,497	10,776
Current	419,505	439,522
Non-accruing loans and leases	12,321	12,463
Total gross loans and leases receivable	429,002	450,298
Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	30,787	30,951
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	30,787	30,951
Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	106	0
Current	7,156	8,412
Non-accruing loans and leases	0	0
Total gross loans and leases receivable	7,262	8,412
Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	345	564
Current	17,754	15,765
Non-accruing loans and leases	354	604
Total gross loans and leases receivable	18,099	16,329
Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,164	598
Current	1,474,485	1,426,072
Accruing loans and leases	1,476,649	1,426,670
Accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	193,366	174,236
Accruing loans and leases	193,366	174,236
Accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	470,202	471,549
Accruing loans and leases	470,202	471,549
Accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	37,528	53,198
Accruing loans and leases	37,528	53,198
Accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	196	0
Current	122,089	98,288
Accruing loans and leases	122,285	98,288
Accruing loans and leases \| Multi-family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	136,978	92,762
Accruing loans and leases	136,978	92,762
Accruing loans and leases \| 1-4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	496	75
Current	43,319	43,639
Accruing loans and leases	43,815	43,714
Accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,366	523
Current	415,315	437,312
Accruing loans and leases	416,681	437,835
Accruing loans and leases \| Direct financing leases, net
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	30,787	30,951
Accruing loans and leases	30,787	30,951
Accruing loans and leases \| Home equity and second mortgages
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	106	0
Current	7,156	8,412
Accruing loans and leases	7,262	8,412
Accruing loans and leases \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	17,745	15,725
Accruing loans and leases	17,745	15,725
Non-accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	17,537	16,158
Current	8,852	9,036
Non-accruing loans and leases	26,389	25,194
Non-accruing loans and leases \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,241	1,183
Current	1,780	1,040
Non-accruing loans and leases	7,021	2,223
Non-accruing loans and leases \| Commercial real estate — non-owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	34	1,609
Non-accruing loans and leases	34	1,609
Non-accruing loans and leases \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Current	2,626	3,440
Non-accruing loans and leases	2,626	3,440
Non-accruing loans and leases \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,872	2,918
Current	0	0
Non-accruing loans and leases	2,872	2,918
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	948	1,240
Current	213	697
Non-accruing loans and leases	1,161	1,937
Non-accruing loans and leases \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	8,131	10,253
Current	4,190	2,210
Non-accruing loans and leases	12,321	12,463
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	345	564
Current	9	40
Non-accruing loans and leases	354	604
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,958	6,143
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial real estate — owner occupied
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	405	0
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	0	2,482
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	496	75
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,951	3,400
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	106	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	186
Financing Receivables, 30 to 59 Days Past Due [Member] \| Accruing loans and leases
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,771	130
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	0	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	0	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	496	75
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	1,169	55
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	106	0
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	1,187	6,013
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	405	0
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	2,482
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	782	3,345
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	186
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	393	636
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	0	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	196	0
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	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	197	636
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	393	468
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	0	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	196	0
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	0	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	197	468
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	168
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	168
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	16,350	9,977
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	4,836	1,183
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	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Construction
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,872	436
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	948	1,240
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,349	6,740
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	345	378
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	16,350	9,977
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	4,836	1,183
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	0	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	0	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	2,872	436
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	948	1,240
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	7,349	6,740
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	$ 345	$ 378

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

Dec. 31, 2017

Dec. 31, 2016

Financing Receivable, Recorded Investment, Aging [Abstract]

Total Past Due

$ 19,701

$ 16,756

Current

1,483,337

1,435,108

Non-accruing loans and leases

26,389