Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Schedule Of Rent Expense

	2011		2010		2009
Rental expense	$	6,463	$	6,080	$	5,624

Schedule Of Future Minimum Rental Payments For Operating Leases

	2012		2013		2014		2015		2016		Thereafter		Total
Minimum payments required	$	5,023	$	4,885	$	4,960	$	2,757	$	1,070	$	4,624	$	23,319