Loans Receivable From Independent Contractors (Schedule Of Independent Contractors) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loans Receivable From Independent Contractors [Abstract]
Revenues	$ 28,522	$ 26,711	$ 22,943
Pretax profits	$ 14,790	$ 13,320	$ 10,695

Net service revenues attributable to the independent contractors.

No definition available.

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