Independent Contractor Operations (Schedule Of Independent Contractors) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Independent Contractor Operations [Abstract]
Revenues	$ 8,054	$ 6,942	$ 24,418	$ 20,434
Pretax profits	$ 4,243	$ 3,611	$ 13,015	$ 10,424