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Derivative Instruments and Hedging Activities (Details) (IRLCs [Member], Derivatives not designated as hedges [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011 | Sep. 30, 2011
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IRLCs [Member] | Derivatives not designated as hedges [Member] |  |  |
Aggregate contractual or notional amounts of derivative financial instruments |  |  |
Notional Amount | $ 14,747 | $ 9,155 | $ 10,421

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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