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Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary Of Significant Accounting Policies Narrative Details
Probability of default or principal loss - low			15.00%
Probability of default or principal loss - medium			33.00%
Probability of default or principal loss - high			67.00%
Total Comprehensive Income	$ 15,205	$ 9,524	$ 164,800	$ 279,826
Outstanding principal balances of loans less than	$ 10,000		$ 10,000

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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