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Basis Of Presentation And Accounting Policies (Reconciliation Of Unobservable Input For Level 3 Fair Value Assets) (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Investment Securities Available for Sale
Dec. 31, 2011
Investment Securities Available for Sale
Jun. 30, 2012
Other Real Estate Owned
Jun. 30, 2012
Covered Loans
Jun. 30, 2012
Covered Other Real Estate Owned
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Beginning balance $ 2,000 $ 2,000 $ 50,301 $ 571,489 $ 78,617
Total gains/(losses) included in net income     (8,065)    
Purchases, sales, issuances, and settlements, net     (12,609) 50,232 (15,134)
Transfers in or out of Level 3     10,391 (19,984) 19,984
Ending balance $ 2,000 $ 2,000 $ 40,018 $ 601,737 $ 83,467