v2.4.0.6

Borrowings Securities Sold under Agreements to Repurchase (Details) (Securities Sold under Agreements to Repurchase [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Securities Sold under Agreements to Repurchase [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Maximum outstanding at any month-end | $ 118,030 | $ 132,380 | $ 94,530
Average amount outstanding for the year | $ 113,443 | $ 108,240 | $ 76,758

X
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References No definition available. + Details
Name: | us-gaap_ShorttermDebtAverageOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section VII -Subsection 2 + Details
Name: | us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration