Annual report pursuant to Section 13 and 15(d)

Schedule of Credit Losses on Debt Securities (Details)

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Schedule of Credit Losses on Debt Securities (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2011
Restated
Beginning balance of credit losses on debt securities for which a portion of an OTTI was recognized in other comprehensive income $ (20,207) $ (60,688)  
Increases to credit losses on securities for which an OTTI was previously recognized and a portion of an OTTI was recognized in other comprehensive income (4,581)   (574)
Additions for credit losses on securities for which an OTTI was previously recognized without any portion of OTTI recognized in other comprehensive income      (16,269)
Reduction for credit losses on securities for which no OTTI was recognized in other comprehensive income at the current measurement date 14,771   12,998
Reduction for securities sold during the period 1,498   37,833
Reduction for securities deconsolidated during the period 3,736   6,254
Reduction for increases in cash flows expected to be collected that are recognized over the remaining life of the security 13   239
Ending balance of credit losses on debt securities for which a portion of an OTTI was recognized in other comprehensive income $ (4,770) $ (60,688)