Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LoansAndLeasesReceivableDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

+ Details

Name:	us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Schedule of loan balances
Total loans	$ 1,678,155		$ 1,565,066
Allowance for loan losses	(13,377)	$ (12,764)	(12,315)	$ (12,104)	$ (11,746)	$ (10,852)
Commercial real estate
Schedule of loan balances
Allowance for loan losses	(4,740)	(4,339)	(4,260)	(4,219)	(3,954)	(3,577)
Commercial
Schedule of loan balances
Allowance for loan losses	(2,007)	(1,937)	(2,011)	(2,015)	(1,936)	(1,874)
Residential real estate
Schedule of loan balances
Allowance for loan losses	(2,820)	(2,651)	(2,521)	(2,333)	(2,310)	(2,205)
Consumer
Schedule of loan balances
Allowance for loan losses	(3,035)	$ (3,050)	(2,848)	$ (2,907)	$ (2,927)	$ (2,766)
Originated Loans
Schedule of loan balances
Total loans	1,419,970		1,262,167
Originated Loans \| Commercial real estate, Owner occupied \| Commercial real estate
Schedule of loan balances
Loan balances	153,088		140,321
Originated Loans \| Commercial real estate, Non-owner occupied \| Commercial real estate
Schedule of loan balances
Loan balances	240,871		199,080
Originated Loans \| Commercial real estate, Farmland \| Commercial real estate
Schedule of loan balances
Loan balances	94,987		70,534
Originated Loans \| Commercial real estate, Other \| Commercial real estate
Schedule of loan balances
Loan balances	91,962		89,025
Originated Loans \| Commercial, Commercial and industrial \| Commercial
Schedule of loan balances
Loan balances	213,552		193,347
Originated Loans \| Residential real estate, 1-4 family residential \| Residential real estate
Schedule of loan balances
Loan balances	303,337		272,421
Originated Loans \| Commercial, Agricultural \| Commercial
Schedule of loan balances
Loan balances	33,946		32,587
Originated Loans \| Residential real estate, Home equity lines of credit \| Residential real estate
Schedule of loan balances
Loan balances	78,082		71,507
Originated Loans \| Consumer, Indirect \| Consumer
Schedule of loan balances
Loan balances	168,643		155,950
Originated Loans \| Consumer, Direct \| Consumer
Schedule of loan balances
Loan balances	30,628		28,519
Originated Loans \| Consumer, Other \| Consumer
Schedule of loan balances
Loan balances	10,874		8,876
Acquired Loans
Schedule of loan balances
Total loans	268,205		312,355
Net Deferred loan costs	3,357		2,859
Allowance for loan losses	(13,377)		(12,315)
Acquired Loans \| Commercial real estate, Owner occupied \| Commercial real estate
Schedule of loan balances
Loan balances	47,438		53,031
Acquired Loans \| Commercial real estate, Non-owner occupied \| Commercial real estate
Schedule of loan balances
Loan balances	18,190		20,286
Acquired Loans \| Commercial real estate, Farmland \| Commercial real estate
Schedule of loan balances
Loan balances	42,257		47,754
Acquired Loans \| Commercial real estate, Other \| Commercial real estate
Schedule of loan balances
Loan balances	10,723		11,964
Acquired Loans \| Commercial, Commercial and industrial \| Commercial
Schedule of loan balances
Loan balances	19,636		27,094
Acquired Loans \| Residential real estate, 1-4 family residential \| Residential real estate
Schedule of loan balances
Loan balances	83,268		96,759
Acquired Loans \| Commercial, Agricultural \| Commercial
Schedule of loan balances
Loan balances	10,848		12,206
Acquired Loans \| Residential real estate, Home equity lines of credit \| Residential real estate
Schedule of loan balances
Loan balances	25,165		28,755
Acquired Loans \| Consumer, Direct \| Consumer
Schedule of loan balances
Loan balances	10,523		14,378
Acquired Loans \| Consumer, Other \| Consumer
Schedule of loan balances
Loan balances	$ 157		$ 128