Loans (Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Past Due	$ 16,165	$ 11,710
Total Loan Receivables	1,307,737	1,150,044	$ 1,145,406
31 - 60 Days [Member]
Past Due	311	1,923
61 - 89 Days [Member]
Past Due	6,188	7,304
90 or Greater Days [Member]
Past Due	9,666	2,483
Commercial Loans [Member]
Past Due	887	1,363
Total Loan Receivables	62,083	56,417	56,376
Commercial Loans [Member] | 31 - 60 Days [Member]
Past Due		892
Commercial Loans [Member] | 61 - 89 Days [Member]
Past Due	8	299
Commercial Loans [Member] | 90 or Greater Days [Member]
Past Due	879	172
Residential First Mortgage Loans [Member]
Past Due	997	546
Total Loan Receivables	156,565	170,374	175,816
Residential First Mortgage Loans [Member] | 61 - 89 Days [Member]
Past Due	794	68
Residential First Mortgage Loans [Member] | 90 or Greater Days [Member]
Past Due	203	478
Residential Rentals Loans [Member]
Past Due	1,006	291
Total Loan Receivables	125,383	110,228	110,905
Residential Rentals Loans [Member] | 61 - 89 Days [Member]
Past Due	976	207
Residential Rentals Loans [Member] | 90 or Greater Days [Member]
Past Due	30	84
Construction And Land Development Loans [Member]
Total Loan Receivables	28,788	27,871	31,094
Home Equity And Second Mortgage Loans [Member]
Past Due	417	171
Total Loan Receivables	36,360	21,351	22,334
Home Equity And Second Mortgage Loans [Member] | 31 - 60 Days [Member]
Past Due	256	19
Home Equity And Second Mortgage Loans [Member] | 61 - 89 Days [Member]
Past Due	11	18
Home Equity And Second Mortgage Loans [Member] | 90 or Greater Days [Member]
Past Due	150	134
Commercial Real Estate Loans [Member]
Past Due	11,317	7,859
Total Loan Receivables	847,945	727,314	712,840
Commercial Real Estate Loans [Member] | 61 - 89 Days [Member]
Past Due	4,399	6,711
Commercial Real Estate Loans [Member] | 90 or Greater Days [Member]
Past Due	6,918	1,148
Consumer Loans [Member]
Past Due		1
Total Loan Receivables	730	573	541
Consumer Loans [Member] | 61 - 89 Days [Member]
Past Due		1
Commercial Equipment Loans [Member]
Past Due	1,541	1,479
Total Loan Receivables	49,883	35,916	$ 35,500
Commercial Equipment Loans [Member] | 31 - 60 Days [Member]
Past Due	55	1,012
Commercial Equipment Loans [Member] | 90 or Greater Days [Member]
Past Due	1,486	467
Commercial Portfolio Segment [Member]
Total Loan Receivables	1,114,082	957,746
PCI Loans [Member]
Current	3,511
Total Loan Receivables	3,511
PCI Loans [Member] | Residential First Mortgage Loans [Member]
Current	468
Total Loan Receivables	468
PCI Loans [Member] | Residential Rentals Loans [Member]
Current	1,261
Total Loan Receivables	1,261
PCI Loans [Member] | Home Equity And Second Mortgage Loans [Member]
Current	319
Total Loan Receivables	319
PCI Loans [Member] | Commercial Real Estate Loans [Member]
Current	1,463
Total Loan Receivables	1,463
All Other Loans [Member]
Current	1,288,061	1,138,334
Total Loan Receivables	1,304,226
All Other Loans [Member] | Commercial Loans [Member]
Current	61,196	55,054
Total Loan Receivables	62,083
All Other Loans [Member] | Residential First Mortgage Loans [Member]
Current	155,100	169,828
Total Loan Receivables	156,097
All Other Loans [Member] | Residential Rentals Loans [Member]
Current	123,116	109,937
Total Loan Receivables	124,122
All Other Loans [Member] | Construction And Land Development Loans [Member]
Current	28,788	27,871
Total Loan Receivables	28,788
All Other Loans [Member] | Home Equity And Second Mortgage Loans [Member]
Current	35,624	21,180
Total Loan Receivables	36,041
All Other Loans [Member] | Commercial Real Estate Loans [Member]
Current	835,165	719,455
Total Loan Receivables	846,482
All Other Loans [Member] | Consumer Loans [Member]
Current	730	572
Total Loan Receivables	730
All Other Loans [Member] | Commercial Equipment Loans [Member]
Current	48,342	$ 34,437
Total Loan Receivables	$ 49,883