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Investments (Details 14) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Allowance For Loan And Lease Losses Roll Forward        
Balance, Beginning of Period $ 14,650 $ 5,664 $ 11,793 $ 6,239
Charge-offs (1,876) (1,157) (4,069) (1,157)
Recoveries 0 0 0 0
Provision (release) (1,763) 3,185 3,287 2,610
Balance, End of Period $ 11,011 $ 7,692 $ 11,011 $ 7,692