Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations, net of income taxes	$ 0	$ (2,615,000)	$ 0	$ 3,171,000
CES [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations, net of income taxes				6,000,000
Alcadon [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations, net of income taxes				(2,100,000)
Amount of intercompany revenue that was previously eliminated from financial statements in consolidation		1,600,000	2,700,000
Interdata [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations, net of income taxes				(700,000)
Pedrena [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of intercompany revenue that was previously eliminated from financial statements in consolidation		$ 1,700,000		$ 3,000,000