Loans and Allowance for Loan Losses (Details 12) - Non-Credit impaired - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	$ 46,388	$ 36,895	$ 46,388	$ 36,895	$ 36,366
Recorded Investment With No Allowance	14,622	12,112	14,622	12,112	10,309
Gross Recorded Investment With Allowance	19,857	15,951	19,857	15,951	16,776
Total Recorded Investment	34,479	28,063	34,479	28,063	27,085
Related Allowance	1,456	1,377	1,456	1,377	1,558
Average Investment In Impaired Loans	32,797	30,391	30,783	27,036
Interest Income Recognized	431	143	830	391
Nonaccrual loans	23,715	30,052	23,715	30,052	27,994
Construction and land development
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	8,321	7,386	8,321	7,386	7,414
Recorded Investment With No Allowance	1,128	2,229	1,128	2,229	1,528
Gross Recorded Investment With Allowance	4,599	2,647	4,599	2,647	3,324
Total Recorded Investment	5,727	4,876	5,727	4,876	4,852
Related Allowance	585	402	585	402	475
Average Investment In Impaired Loans	5,418	5,277	5,290	5,308
Interest Income Recognized	116	23	170	58
Nonaccrual loans	1,291	2,851	1,291	2,851	2,920
Commercial non-owner occupied
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	3,935	4,846	3,935	4,846	4,920
Recorded Investment With No Allowance	1,644	2,700	1,644	2,700	2,539
Gross Recorded Investment With Allowance	925	1,084	925	1,084	1,071
Total Recorded Investment	2,569	3,784	2,569	3,784	3,610
Related Allowance	26	30	26	30	77
Average Investment In Impaired Loans	2,590	4,966	3,090	3,469
Interest Income Recognized	13	8	38	36
Nonaccrual loans	1,117	2,483	1,117	2,483	2,325
Commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	2,408	5,334	2,408	5,334	5,245
Commercial owner occupied real estate
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	16,195	13,097	16,195	13,097	12,508
Recorded Investment With No Allowance	7,325	5,576	7,325	5,576	5,546
Gross Recorded Investment With Allowance	4,120	3,860	4,120	3,860	3,614
Total Recorded Investment	11,445	9,436	11,445	9,436	9,160
Related Allowance	248	100	248	100	172
Average Investment In Impaired Loans	11,208	10,294	10,303	10,242
Interest Income Recognized	89	27	255	103
Nonaccrual loans	4,353	6,532	4,353	6,532	3,605
Consumer real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	9,576	5,515	9,576	5,515	7,427
Consumer owner occupied
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	8,969	2,972	8,969	2,972	3,393
Recorded Investment With No Allowance	3,928		3,928
Gross Recorded Investment With Allowance	3,890	2,427	3,890	2,427	2,966
Total Recorded Investment	7,818	2,427	7,818	2,427	2,966
Related Allowance	121	121	121	121	144
Average Investment In Impaired Loans	7,070	2,480	5,392	2,720
Interest Income Recognized	80	30	133	63
Nonaccrual loans	8,043	1,481	8,043	1,481	6,015
Home equity loans
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	390		390		131
Recorded Investment With No Allowance	185		185
Gross Recorded Investment With Allowance	108		108		31
Total Recorded Investment	293		293		31
Related Allowance	3		3		1
Average Investment In Impaired Loans	263		162
Interest Income Recognized	4		7
Nonaccrual loans	1,533	4,034	1,533	4,034	1,412
Commercial and industrial
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	1,939	1,447	1,939	1,447	1,625
Recorded Investment With No Allowance	295	693	295	693	336
Gross Recorded Investment With Allowance	750	417	750	417	572
Total Recorded Investment	1,045	1,110	1,045	1,110	908
Related Allowance	21	12	21	12	41
Average Investment In Impaired Loans	1,028	929	976	757
Interest Income Recognized	29	2	47	15
Nonaccrual loans	466	648	466	648	600
Other income producing property
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	5,601	7,066	5,601	7,066	6,280
Recorded Investment With No Allowance	117	914	117	914	360
Gross Recorded Investment With Allowance	4,671	5,466	4,671	5,466	5,138
Total Recorded Investment	4,788	6,380	4,788	6,380	5,498
Related Allowance	430	711	430	711	646
Average Investment In Impaired Loans	4,788	6,377	5,143	4,515
Interest Income Recognized	95	52	174	112
Nonaccrual loans	740	2,235	740	2,235	1,348
Consumer
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	151	81	151	81	95
Gross Recorded Investment With Allowance	101	50	101	50	60
Total Recorded Investment	101	50	101	50	60
Related Allowance	3	1	3	1	2
Average Investment In Impaired Loans	85	68	80	25
Interest Income Recognized	1	1	2	4
Nonaccrual loans	556	155	556	155	344
Restructured loans.
Loans and Allowance for Loan Losses
Nonaccrual loans	5,616	9,633	$ 5,616	9,633	9,425
Number of months generally required to return to accruing status			6 months
Other Loans
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	887		$ 887
Gross Recorded Investment With Allowance	693		693
Total Recorded Investment	693		693
Related Allowance	19		19
Average Investment In Impaired Loans	347		347
Interest Income Recognized	4		4
Acquired loans
Loans and Allowance for Loan Losses
Nonaccrual loans	4,130	5,359	4,130	5,359	7,538
Acquired loans \| Construction and land development
Loans and Allowance for Loan Losses
Nonaccrual loans	39		39		41
Acquired loans \| Commercial non-owner occupied
Loans and Allowance for Loan Losses
Nonaccrual loans	95	14	95	14	645
Acquired loans \| Commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	134	14	134	14	686
Acquired loans \| Commercial owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	40	38	40	38	38
Acquired loans \| Consumer real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	2,163	3,961	2,163	3,961	5,192
Acquired loans \| Consumer owner occupied
Loans and Allowance for Loan Losses
Nonaccrual loans	1,048	2,733	1,048	2,733	3,685
Acquired loans \| Home equity loans
Loans and Allowance for Loan Losses
Nonaccrual loans	1,115	1,228	1,115	1,228	1,507
Acquired loans \| Commercial and industrial
Loans and Allowance for Loan Losses
Nonaccrual loans	243	165	243	165	120
Acquired loans \| Other income producing property
Loans and Allowance for Loan Losses
Nonaccrual loans	382	318	382	318	309
Acquired loans \| Consumer
Loans and Allowance for Loan Losses
Nonaccrual loans	$ 1,168	$ 863	$ 1,168	$ 863	$ 1,193

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