Fair Value (Details 4) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Carrying amount and estimated fair value of financial instruments
Fair value	$ 10,644	$ 9,725
Securities available-for-sale	866,701	891,082
Restricted Investments	10,848	10,838
Accrued interest receivable	12,846	11,733
Deposits	(2,479,241)	(2,442,369)
Fair Value, Inputs, Level 1 [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	19,833	19,715
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Securities available-for-sale	0	0
Loans Receivable, Fair Value Disclosure	0	0
Accrued interest receivable	0	0
Deposits	0	0
Short-term borrowings	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	0	0
Fair Value, Inputs, Level 2 [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	47,563	68,980
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	44,505	9,815
Securities available-for-sale	850,980	871,482
Loans Receivable, Fair Value Disclosure	0	0
Accrued interest receivable	3,787	3,366
Deposits	(2,480,499)	(2,442,612)
Short-term borrowings	(31,370)	(33,831)
Federal Home Loan Bank advances	(10,136)	(12,971)
Accrued interest payable	(378)	(389)
Fair Value, Inputs, Level 3 [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Securities available-for-sale	15,721	19,600
Loans Receivable, Fair Value Disclosure	1,865,027	1,789,938
Accrued interest receivable	9,059	8,367
Deposits	0	0
Short-term borrowings	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	0	0
Reported Value Measurement [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	67,396	88,695
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	44,505	9,815
Securities available-for-sale	866,701	891,082
Restricted Investments	10,848	10,838
Loans Receivable, Fair Value Disclosure	1,802,451	1,743,862
Accrued interest receivable	12,846	11,733
Deposits	(2,479,241)	(2,442,369)
Short-term borrowings	(31,370)	(33,831)
Federal Home Loan Bank advances	(10,132)	(12,677)
Accrued interest payable	(378)	(389)
Estimate of Fair Value Measurement [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	67,396	88,695
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	44,505	9,815
Securities available-for-sale	866,701	891,082
Loans Receivable, Fair Value Disclosure	1,865,027	1,789,938
Accrued interest receivable	12,846	11,733
Deposits	(2,480,499)	(2,442,612)
Short-term borrowings	(31,370)	(33,831)
Federal Home Loan Bank advances	(10,136)	(12,971)
Accrued interest payable	$ (378)	$ (389)

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Fair value portion of federal funds sold and securities borrowed or purchased under agreements to resell.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 14A
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Amount of interest payable on debt, including, but not limited to, trade payables.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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