Restructuring (Summary Of Restructuring Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	$ 612,000
Charges	430,000	735,000
Settlements	(1,042,000)	(123,000)
Balance at end of period		612,000
Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	163,000
Charges	359,000	208,000
Settlements	(522,000)	(45,000)
Balance at end of period		163,000
Facility Costs And Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	65,000
Charges	71,000	101,000
Settlements	(136,000)	(36,000)
Balance at end of period		65,000
Inventory Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	384,000
Charges		426,000
Settlements	(384,000)	(42,000)
Balance at end of period		$ 384,000