Fair Value (Details 4) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Carrying amount and estimated fair value of financial instruments
Fair value	$ 6,863	$ 8,600
Securities available-for-sale	855,681	853,725
Restricted Investments	10,369	10,359
Accrued interest receivable	12,099	12,311
Deposits	(2,438,012)	(2,428,526)
Fair Value, Inputs, Level 1 [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	19,539	21,047
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	30,983	53,965
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	5,000	6,952
Securities available-for-sale	840,008	837,147
Loans Receivable, Fair Value Disclosure	0	0
Accrued interest receivable	3,926	3,340
Deposits	(2,437,831)	(2,414,555)
Short-term borrowings	(35,821)	(80,989)
Federal Home Loan Bank advances	(136)	(137)
Accrued interest payable	(313)	(363)
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	15,673	16,578
Loans Receivable, Fair Value Disclosure	1,831,597	1,854,046
Accrued interest receivable	8,173	8,971
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	50,522	75,012
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	5,000	6,952
Securities available-for-sale	855,681	853,725
Restricted Investments	10,369	10,359
Loans Receivable, Fair Value Disclosure	1,815,498	1,820,407
Accrued interest receivable	12,099	12,311
Deposits	(2,438,012)	(2,428,526)
Short-term borrowings	(35,821)	(80,989)
Federal Home Loan Bank advances	(132)	(132)
Accrued interest payable	(313)	(363)
Estimate of Fair Value Measurement [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	50,522	75,012
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	5,000	6,952
Securities available-for-sale	855,681	853,725
Loans Receivable, Fair Value Disclosure	1,831,597	1,854,046
Accrued interest receivable	12,099	12,311
Deposits	(2,437,831)	(2,414,555)
Short-term borrowings	(35,821)	(80,989)
Federal Home Loan Bank advances	(136)	(137)
Accrued interest payable	$ (313)	$ (363)

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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-Section 50
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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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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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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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-SubTopic 10
-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
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6517073

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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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