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Derivative Activities (Interest rate swap not designated as hedging instruments and their term) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014
Derivatives Offered to Clients [Member] |
Derivative [Line Items] |
Amount | $ 16,594
Derivatives Offered to Clients [Member] | Rate 5.13% [Member] |
Derivative [Line Items] |
Amount | 4,094
Fixed rate | 5.13%
Settlement Date | Jul. 03, 2006
Maturity Date | Jul. 03, 2016
Derivatives Offered to Clients [Member] | Rate 5.51% [Member] |
Derivative [Line Items] |
Amount | 12,500
Fixed rate | 5.505%
Settlement Date | Apr. 11, 2009
Maturity Date | Apr. 11, 2019
Mirror Image Derivatives [Member] |
Derivative [Line Items] |
Amount | 16,594
Mirror Image Derivatives [Member] | Rate 5.13% [Member] |
Derivative [Line Items] |
Amount | 4,094
Fixed rate | 5.13%
Settlement Date | Jul. 03, 2006
Maturity Date | Jul. 03, 2016
Mirror Image Derivatives [Member] | Rate 5.51% [Member] |
Derivative [Line Items] |
Amount | $ 12,500
Fixed rate | 5.505%
Settlement Date | Apr. 11, 2009
Maturity Date | Apr. 11, 2019

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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
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition The settlement date of an investment contract. + 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
Name: | invest_InvestmentContractSettlementDate
Namespace Prefix: | invest_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeMaturityDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration