Restructuring and Other Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring and Other Charges Reserve [Roll Forward]
Accrued Restructuring and Other Charcges, Beginning balance	$ 0	$ 0
Additions		2,094
Cash Payments	(191)	(2,094)
Acccrued Restructuring and Other Charges, Ending balance	999	0
Reorganization In Business Units [Member]
Restructuring and Other Charges Reserve [Roll Forward]
Additions		1,630
Westell Acquisition Transition Costs [Member]
Restructuring and Other Charges Reserve [Roll Forward]
Additions		500
Consolidation of Product Groups [Member]
Restructuring and Other Charges Reserve [Roll Forward]
Additions	$ 1,190