Fair Value (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Carrying amount and estimated fair value of financial instruments
Fair value	$ 10,582	$ 14,606
Securities available-for-sale	885,836	897,053
Restricted Investments	10,838	16,404
Accrued interest receivable	12,265	11,593
Deposits	(2,418,589)	(2,457,197)
Fair Value, Inputs, Level 1 [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	21,962	22,597
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
FDIC Indemnification Asset		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	41,316	55,505
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	8,000
Securities available-for-sale	865,994	875,850
Loans Receivable, Fair Value Disclosure	0	0
FDIC Indemnification Asset		(74)
Accrued interest receivable	3,719	3,183
Deposits	(2,420,624)	(2,459,703)
Short-term borrowings	(23,336)	(48,015)
Federal Home Loan Bank advances	(13,683)	(13,605)
Accrued interest payable	(396)	(456)
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	19,842	21,203
Loans Receivable, Fair Value Disclosure	1,804,961	1,810,885
FDIC Indemnification Asset		0
Accrued interest receivable	8,546	8,410
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	63,278	78,102
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	8,000
Securities available-for-sale	885,836	897,053
Restricted Investments	10,838	16,404
Loans Receivable, Fair Value Disclosure	1,746,742	1,762,589
FDIC Indemnification Asset		(74)
Accrued interest receivable	12,265	11,593
Deposits	(2,418,589)	(2,457,197)
Short-term borrowings	(23,336)	(48,015)
Federal Home Loan Bank advances	(13,251)	(12,886)
Accrued interest payable	(396)	(456)
Estimate of Fair Value Measurement [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	63,278	78,102
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	8,000
Securities available-for-sale	885,836	897,053
Loans Receivable, Fair Value Disclosure	1,804,961	1,810,885
FDIC Indemnification Asset		(74)
Accrued interest receivable	12,265	11,593
Deposits	(2,420,624)	(2,459,703)
Short-term borrowings	(23,336)	(48,015)
Federal Home Loan Bank advances	(13,683)	(13,605)
Accrued interest payable	$ (396)	$ (456)

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

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-SubTopic 10

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses.

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Fair value portion of federal funds sold and securities borrowed or purchased under agreements to resell.

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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

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

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Amount of interest payable on debt, including, but not limited to, trade payables.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-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

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-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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