Business Combinations - Restructuring (Details) (WJ Communications [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 1,118	$ 5,171
Payments	(1,118)	(4,192)
Accretion		139
Balance, end of period	0	1,118
Lease abandonment costs [Member]
Restructuring Reserve [Roll Forward]
Balance, beginning of period	1,118	5,117
Payments	(1,118)	(4,138)
Accretion		139
Balance, end of period	0	1,118
Personnel [Member]
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	54
Payments	0	(54)
Accretion		0
Balance, end of period	$ 0	$ 0