Loans Receivable (Narratives) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Accounts Notes And Loans Receivable Line Items
Undiscounted contractual cash flows for the most recent acquired loans and accounted under ASC 310-30	$ 3,956,203

- Definition

The total undiscounted amount of all uncollected contractual principal and contractual interest payments both past due and scheduled for the future, adjusted for the timing of prepayments, if considered, less any reduction by the investor at the acquisition date. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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