Discontinued Operations (Narrative) (Details)	3 Months Ended								12 Months Ended					0 Months Ended		12 Months Ended			0 Months Ended	12 Months Ended				0 Months Ended		12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2011 Turn Key [Member] USD ($)	Dec. 31, 2010 Turn Key [Member] USD ($)	Oct. 16, 2012 Interdata [Member] USD ($)	Oct. 16, 2012 Interdata [Member] EUR (€)	Dec. 31, 2012 Interdata [Member] USD ($)	Dec. 31, 2011 Interdata [Member] USD ($)	Dec. 31, 2010 Interdata [Member] USD ($)	Oct. 12, 2012 Alcadon [Member] USD ($)	Dec. 31, 2012 Alcadon [Member] USD ($)	Dec. 31, 2011 Alcadon [Member] USD ($)	Dec. 31, 2010 Alcadon [Member] USD ($)	Dec. 28, 2012 Alcadon [Member] USD ($)	Mar. 29, 2012 CES [Member] USD ($)	Mar. 29, 2012 CES [Member] CHF	Dec. 31, 2012 CES [Member] USD ($)	Dec. 31, 2011 CES [Member] USD ($)	Dec. 31, 2010 CES [Member] USD ($)	Oct. 26, 2010 Source Photonics [Member] USD ($)	Dec. 31, 2010 Source Photonics [Member] USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operation, disposal of discontinued operation, purchase price														$ 19,000,000	€ 14,600,000				$ 7,700,000					$ 28,400,000	25,800,000
Transaction costs														800,000					300,000
Divestiture of Business, Escrow Adjustment																							700,000
Proceeds from divestiture of business																			6,500,000										117,800,000
Cash divested from deconsolidation																			1,200,000
Share purchase agreement, potential purchase price allocation, cash less negotiated liabilities																			800,000
Payments of dividends																			3,700,000
Proceeds from Divestiture of Businesses, Net of Cash Divested																			10,600,000
Amount put into escrow																								2,800,000	2,600,000
Proceeds from sales of business																								24,200,000
Other closing costs																								1,200,000
Gain (loss) from discontinued operations	9,788,000	(2,108,000)	(630,000)	5,789,000	(3,696,000)	597,000	(2,040,000)	1,665,000	12,839,000	(3,474,000)	49,935,000	(3,414,000)	(1,700,000)			2,611,000	1,387,000	2,059,000		4,451,000	(3,750,000)	2,385,000				5,779,000	2,304,000	3,384,000		43,806,000
Income from discontinued operation, before tax																										6,500,000
Loss from discontinued operation, before tax																										100,000
Income tax netted from Income from Discontinued Operations									4,588,000	5,791,000	3,855,000	20,000	1,000			(244,000)	2,045,000	1,011,000		643,000	1,271,000	920,000		400,000		556,000	2,454,000	1,197,000		728,000
Assumption of debt																													32,900,000
Payment of management bonuses																													$ 4,600,000