Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments And Contingencies [Abstract]
Rent expense	$ 1,531	$ 1,497	$ 1,365
Remaining rentals payable, 2013	1,363
Remaining rentals payable, 2014	860
Remaining rentals payable, 2015	946
Remaining rentals payable, 2016	447
Remaining rentals payable, 2017	223
Royalty expense			1,000
Technology access fee asset	$ 380	$ 312