Fair Value (Details 4) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Carrying amount and estimated fair value of financial instruments
Securities available-for-sale	$ 901,550	$ 897,053
Restricted Investments	10,828	16,404
Accrued interest receivable	11,116	11,593
Deposits	(2,398,574)	(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	20,743	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	39,870	55,505
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	2,000	8,000
Securities available-for-sale	881,959	875,850
Loans Receivable, Fair Value Disclosure	0	0
FDIC Indemnification Asset		(74)
Accrued interest receivable	3,296	3,183
Deposits	(2,400,793)	(2,459,703)
Short-term borrowings	(84,819)	(48,015)
Federal Home Loan Bank advances	(11,213)	(13,605)
Accrued interest payable	(382)	(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	19,591	21,203
Loans Receivable, Fair Value Disclosure	1,812,200	1,810,885
FDIC Indemnification Asset		0
Accrued interest receivable	7,820	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	60,613	78,102
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	2,000	8,000
Securities available-for-sale	901,550	897,053
Restricted Investments	10,828	16,404
Loans Receivable, Fair Value Disclosure	1,763,927	1,762,589
FDIC Indemnification Asset		(74)
Accrued interest receivable	11,116	11,593
Deposits	(2,398,574)	(2,457,197)
Short-term borrowings	(84,819)	(48,015)
Federal Home Loan Bank advances	(10,738)	(12,886)
Accrued interest payable	(382)	(456)
Estimate of Fair Value Measurement [Member]
Carrying amount and estimated fair value of financial instruments
Cash and Cash Equivalents, Fair Value Disclosure	60,613	78,102
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	2,000	8,000
Securities available-for-sale	901,550	897,053
Loans Receivable, Fair Value Disclosure	1,812,200	1,810,885
FDIC Indemnification Asset		(74)
Accrued interest receivable	11,116	11,593
Deposits	(2,400,793)	(2,459,703)
Short-term borrowings	(84,819)	(48,015)
Federal Home Loan Bank advances	(11,213)	(13,605)
Accrued interest payable	$ (382)	$ (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

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Section 50

-Paragraph 5

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

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Reference 1: 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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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

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

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-Publisher FASB

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-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.8)

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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

-Name Accounting Standards Codification

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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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