Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	$ 715,452	$ 638,107
Trading securities	3,560	3,233
Interest Rate Derivative Liabilities, at Fair Value	(1,779)
U.S. Treasury [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	6,069	8,130
U.S. Government sponsored entities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	113,030	107,492
Trading securities	56	55
States and political subdivisions [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	161,583	158,437
Residential mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	372,436	300,126
Commercial mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	2,132	2,122
Corporate notes and bonds [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	13,416	13,860
Trading securities	101	100
Pooled trust preferred [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	360	340
Pooled SBA [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	44,883	46,056
Other Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	1,543	1,544
Equity securities - financial services [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	654	779
Equity securities - industrials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	476	324
Equity securities - health care [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	428	204
Equity securities - utilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		197
Large cap growth mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	147	145
Certificates of deposit [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	382	255
International mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	252	257
Equity securities - energy [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	209	72
Equity Securities - technology [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	158	75
Equity securities - Consumer Discretionary [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	156	126
Large Cap Value Mutual Fund [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	103
Money market mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	108	241
Large Cap Value mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		105
Real estate investment trust mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	64	68
Equity securities - Consumer Staples [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	54	145
Small cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	25	25
Mid cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	25	23
Equity securities - materials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	162	37
Interest rate swap [Member]
Assets and liabilities measured at fair value on a recurring basis
Interest Rate Derivative Liabilities, at Fair Value		(1,669)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	49,574	62,832
Trading securities	3,403	3,078
Interest Rate Derivative Liabilities, at Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| U.S. Treasury [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| U.S. Government sponsored entities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	2,000
Trading securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| States and political subdivisions [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	4,655
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Residential mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	3,148	8,577
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Commercial mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Corporate notes and bonds [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Trading securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Pooled trust preferred [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Pooled SBA [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	44,883	46,056
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Other Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	1,543	1,544
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - financial services [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	654	779
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - industrials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	476	324
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - health care [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	428	204
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - utilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		197
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Large cap growth mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	147	145
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Certificates of deposit [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	382	255
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| International mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	252	257
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - energy [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	209	72
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities - technology [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	158	75
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - Consumer Discretionary [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	156	126
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Large Cap Value Mutual Fund [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	103
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Money market mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	108	241
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Large Cap Value mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		105
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Real estate investment trust mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	64	68
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - Consumer Staples [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	54	145
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Small cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	25	25
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mid cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	25	23
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity securities - materials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	162	37
Significant Other Observable Inputs (Level 2) [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	663,447	572,875
Trading securities	157	155
Interest Rate Derivative Liabilities, at Fair Value	(1,779)
Significant Other Observable Inputs (Level 2) [Member] \| U.S. Treasury [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	6,069	8,130
Significant Other Observable Inputs (Level 2) [Member] \| U.S. Government sponsored entities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	113,030	105,492
Trading securities	56	55
Significant Other Observable Inputs (Level 2) [Member] \| States and political subdivisions [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	161,583	153,782
Significant Other Observable Inputs (Level 2) [Member] \| Residential mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	369,288	291,549
Significant Other Observable Inputs (Level 2) [Member] \| Commercial mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	2,132	2,122
Significant Other Observable Inputs (Level 2) [Member] \| Corporate notes and bonds [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	11,345	11,800
Trading securities	101	100
Significant Other Observable Inputs (Level 2) [Member] \| Pooled trust preferred [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Pooled SBA [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Other Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - financial services [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - industrials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - health care [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - utilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		0
Significant Other Observable Inputs (Level 2) [Member] \| Large cap growth mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Certificates of deposit [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| International mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - energy [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities - technology [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - Consumer Discretionary [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Large Cap Value Mutual Fund [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0
Significant Other Observable Inputs (Level 2) [Member] \| Money market mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Large Cap Value mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		0
Significant Other Observable Inputs (Level 2) [Member] \| Real estate investment trust mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - Consumer Staples [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Small cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Mid cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity securities - materials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Interest rate swap [Member]
Assets and liabilities measured at fair value on a recurring basis
Interest Rate Derivative Liabilities, at Fair Value		(1,669)
Significant Unobservable Inputs (Level 3) [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	2,431	2,400
Trading securities	0	0
Interest Rate Derivative Liabilities, at Fair Value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| U.S. Treasury [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| U.S. Government sponsored entities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| States and political subdivisions [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Residential mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Commercial mortgage and asset backed [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Corporate notes and bonds [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	2,071	2,060
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Pooled trust preferred [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	360	340
Significant Unobservable Inputs (Level 3) [Member] \| Pooled SBA [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Other Securities [Member]
Assets and liabilities measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - financial services [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - industrials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - health care [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - utilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		0
Significant Unobservable Inputs (Level 3) [Member] \| Large cap growth mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Certificates of deposit [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| International mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - energy [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities - technology [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - Consumer Discretionary [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Large Cap Value Mutual Fund [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0
Significant Unobservable Inputs (Level 3) [Member] \| Money market mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Large Cap Value mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities		0
Significant Unobservable Inputs (Level 3) [Member] \| Real estate investment trust mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - Consumer Staples [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Small cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Mid cap mutual funds [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity securities - materials [Member]
Assets and liabilities measured at fair value on a recurring basis
Trading securities	$ 0	$ 0

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

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

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

+ References

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

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-Name Accounting Standards Codification

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-SubTopic 210

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-Paragraph 1

-Subparagraph (SX 210.9-03.4)

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details