Consumer Loans, Credit Quality Information And Allowances And Liabilities For Estimated Losses On Consumer Loans (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2012 D	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual for losses on consumer loan guaranty obligations	$ 3,400,000		$ 3,100,000	$ 2,500,000
Allowance deducted from the carrying value of consumer loans	79,246,000	70,571,000	63,072,000	47,335,000	37,211,000	38,953,000
Active consumer loans owned by third-party lenders	$ 55,300,000		$ 59,400,000	$ 51,200,000
Guarantee obligation expiry period (in days)	90
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Uncollectible period for classifying consumer loan as nonperforming (in days)	60
Nonperforming loans expiry period (in days)	59
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonperforming loans expiry period (in days)	1