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Summary Of Significant Accounting Policies (Restricted Cash And Cash Equivalents) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]
Cash related to secured financings	$ 80,032	$ 62,536
Cash held in trusts for future vehicle service contract claims	48,350	42,143
Total restricted cash and cash equivalents	128,382	104,679
VSC Re [Member]
Summary Of Significant Accounting Policies [Line Items]
Total restricted cash and cash equivalents	48,297	42,026
Discontinued Profit Sharing Arrangement [Member]
Summary Of Significant Accounting Policies [Line Items]
Total restricted cash and cash equivalents	$ 53	$ 117

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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