Discontinued Operations (Income Statement and Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended									0 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Interdata [Member]	Dec. 31, 2011 Interdata [Member]	Dec. 31, 2010 Interdata [Member]	Dec. 31, 2012 Alcadon [Member]	Dec. 31, 2011 Alcadon [Member]	Dec. 31, 2010 Alcadon [Member]	Mar. 29, 2012 CES [Member]	Dec. 31, 2012 CES [Member]	Dec. 31, 2011 CES [Member]	Dec. 31, 2010 CES [Member]	Dec. 31, 2011 Turn Key [Member]	Dec. 31, 2010 Turn Key [Member]	Dec. 31, 2010 Source Photonics [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue												$ 27,602	$ 38,282	$ 33,507	$ 24,320	$ 36,760	$ 29,628		$ 6,829	$ 34,643	$ 29,436	$ 1,907	$ 7,930	$ 195,132
Income (loss) before income taxes												(3,175)	3,432	3,070	(1,088)	(2,479)	3,305		(135)	4,758	4,581	(240)	(1,699)	7,006
Provision (benefit) for income taxes									4,588	5,791	3,855	(244)	2,045	1,011	643	1,271	920	400	556	2,454	1,197	20	1	728
Income from operations of discontinued operations												(2,931)	1,387	2,059	(1,731)	(3,750)	2,385		(691)	2,304	3,384	(260)	(1,700)	6,278
Gain on sale												5,542			6,182				6,470			(3,154)		37,528
Tax effect of income (loss) from disposal of discontinued operation												623			1,341				1,668			0		0
Net income (loss) from discontinued operations, net of income taxes	9,788	(2,108)	(630)	5,789	(3,696)	597	(2,040)	1,665	12,839	(3,474)	49,935	2,611	1,387	2,059	4,451	(3,750)	2,385		5,779	2,304	3,384	(3,414)	(1,700)	43,806
Revenues attributed to intercompany activities												4,249	6,630	5,906	3,931	8,111	6,251
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Cash and cash equivalents													6,370			6,392				12,364
Time deposits																101				1,281
Accounts receivable, net													13,173			3,912				5,310
Inventories													1,554			5,169				4,029
Other current assets													1,115			409				1,826
Total current assets	0				63,005				0	63,005			22,212			15,983				24,810
Property and equipment, net													2,369			660				2,571
Goodwill													2,057			3,737				12,843
Other assets													260							(119)
Total assets													26,898			20,380				40,105
Accounts payable													4,191			1,988				705
Accrued liabilities													3,942			2,101				1,802
Other current liabilities													3,382			1,854				729
Non-current liabilities													380			599				467
Total liabilities													$ 11,895			$ 6,542				$ 3,703