Loans and Allowance for Loan Losses - Impaired non acquired and acquired loans - FASB 310-20 - (Details 12) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Credit impaired
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	$ 43,010	$ 36,366
Recorded Investment With No Allowance	9,447	10,309
Gross Recorded Investment With Allowance	20,771	16,776
Total Recorded Investment	30,218	27,085
Related Allowance	1,607	1,558
Average Investment In Impaired Loans	28,651	26,565	$ 35,331
Interest Income Recognized	1,216	598	393
Credit impaired \| Commercial non-owner occupied real estate \| Construction and land development
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	9,931	7,414
Recorded Investment With No Allowance	1,004	1,528
Gross Recorded Investment With Allowance	5,276	3,324
Total Recorded Investment	6,280	4,852
Related Allowance	615	475
Average Investment In Impaired Loans	5,566	5,295	10,589
Interest Income Recognized	263	80	98
Credit impaired \| Commercial non-owner occupied real estate \| Other commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	2,909	4,920
Recorded Investment With No Allowance	233	2,539
Gross Recorded Investment With Allowance	1,219	1,071
Total Recorded Investment	1,452	3,610
Related Allowance	34	77
Average Investment In Impaired Loans	2,531	3,145	4,030
Interest Income Recognized	66	68
Credit impaired \| Consumer real estate \| Consumer owner occupied
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	9,001	3,393
Recorded Investment With No Allowance	3,505
Gross Recorded Investment With Allowance	4,044	2,966
Total Recorded Investment	7,549	2,966
Related Allowance	138	144
Average Investment In Impaired Loans	5,257	2,990	845
Interest Income Recognized	183	113	154
Credit impaired \| Consumer real estate \| Home equity loans
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	483	131
Recorded Investment With No Allowance	186
Gross Recorded Investment With Allowance	123	31
Total Recorded Investment	309	31
Related Allowance	3	1
Average Investment In Impaired Loans	170	15
Interest Income Recognized	10	1
Credit impaired \| Commercial owner occupied real estate
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	11,516	12,508
Recorded Investment With No Allowance	4,134	5,546
Gross Recorded Investment With Allowance	3,591	3,614
Total Recorded Investment	7,725	9,160
Related Allowance	101	172
Average Investment In Impaired Loans	8,442	10,360	15,170
Interest Income Recognized	368	141	106
Credit impaired \| Commercial and industrial
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	2,641	1,625
Recorded Investment With No Allowance	273	336
Gross Recorded Investment With Allowance	1,214	572
Total Recorded Investment	1,487	908
Related Allowance	279	41
Average Investment In Impaired Loans	1,198	657	1,234
Interest Income Recognized	61	27
Credit impaired \| Other income producing property
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	5,763	6,280
Recorded Investment With No Allowance	112	360
Gross Recorded Investment With Allowance	4,779	5,138
Total Recorded Investment	4,891	5,498
Related Allowance	422	646
Average Investment In Impaired Loans	5,195	4,073	3,463
Interest Income Recognized	245	163	$ 35
Credit impaired \| Consumer
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	155	95
Gross Recorded Investment With Allowance	102	60
Total Recorded Investment	102	60
Related Allowance	3	2
Average Investment In Impaired Loans	81	30
Interest Income Recognized	4	5
Credit impaired \| Other Loans
Loans and Allowance for Loan Losses
Unpaid Contractual Principal Balance	611
Gross Recorded Investment With Allowance	423
Total Recorded Investment	423
Related Allowance	12
Average Investment In Impaired Loans	211
Interest Income Recognized	$ 16
Non-Credit impaired \| Restructured loans. \| Minimum
Loans and Allowance for Loan Losses
Number of months generally required to return to accruing status	6 months
Non acquired non-accrual loans
Loans and Allowance for Loan Losses
Nonaccrual loans	$ 18,447	27,994
Non acquired non-accrual loans \| Commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	1,274	5,245
Non acquired non-accrual loans \| Commercial non-owner occupied real estate \| Construction and land development
Loans and Allowance for Loan Losses
Nonaccrual loans	1,090	2,920
Non acquired non-accrual loans \| Commercial non-owner occupied real estate \| Other commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	184	2,325
Non acquired non-accrual loans \| Consumer real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	9,535	7,427
Non acquired non-accrual loans \| Consumer real estate \| Consumer owner occupied
Loans and Allowance for Loan Losses
Nonaccrual loans	7,766	6,015
Non acquired non-accrual loans \| Consumer real estate \| Home equity loans
Loans and Allowance for Loan Losses
Nonaccrual loans	1,769	1,412
Non acquired non-accrual loans \| Commercial owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	3,056	3,605
Non acquired non-accrual loans \| Commercial and industrial
Loans and Allowance for Loan Losses
Nonaccrual loans	515	600
Non acquired non-accrual loans \| Other income producing property
Loans and Allowance for Loan Losses
Nonaccrual loans	746	1,348
Non acquired non-accrual loans \| Consumer
Loans and Allowance for Loan Losses
Nonaccrual loans	659	344
Non acquired non-accrual loans \| Restructured loans.
Loans and Allowance for Loan Losses
Nonaccrual loans	2,662	9,425
Acquired non-credit impaired non-accrual loans
Loans and Allowance for Loan Losses
Nonaccrual loans	3,764	7,538
Acquired non-credit impaired non-accrual loans \| Commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	37	686
Acquired non-credit impaired non-accrual loans \| Commercial non-owner occupied real estate \| Construction and land development
Loans and Allowance for Loan Losses
Nonaccrual loans	37	41
Acquired non-credit impaired non-accrual loans \| Commercial non-owner occupied real estate \| Other commercial non-owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	0	645
Acquired non-credit impaired non-accrual loans \| Consumer real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	2,079	5,192
Acquired non-credit impaired non-accrual loans \| Consumer real estate \| Consumer owner occupied
Loans and Allowance for Loan Losses
Nonaccrual loans	976	3,685
Acquired non-credit impaired non-accrual loans \| Consumer real estate \| Home equity loans
Loans and Allowance for Loan Losses
Nonaccrual loans	1,103	1,507
Acquired non-credit impaired non-accrual loans \| Commercial owner occupied real estate
Loans and Allowance for Loan Losses
Nonaccrual loans	44	38
Acquired non-credit impaired non-accrual loans \| Commercial and industrial
Loans and Allowance for Loan Losses
Nonaccrual loans	1	120
Acquired non-credit impaired non-accrual loans \| Other income producing property
Loans and Allowance for Loan Losses
Nonaccrual loans	168	309
Acquired non-credit impaired non-accrual loans \| Consumer
Loans and Allowance for Loan Losses
Nonaccrual loans	$ 1,435	$ 1,193

Nonaccrual TDRs are returned to accruing status after demonstrated sustained repayment performance.

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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 (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524

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-Topic 310
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-Section 50
-Paragraph 14A
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