Discontinued Operations - Income Statement and Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			0 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Mar. 29, 2012 CES [Member]	Sep. 30, 2012 CES [Member]	Sep. 30, 2011 CES [Member]	Dec. 31, 2011 CES [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue							$ 6,829	$ 26,019
Income (loss) before income taxes							(135)	3,250
Provision (benefit) for income taxes			0	889		500	0	821
Income from operations of discontinued operations							(135)	2,429
Net income (loss) from discontinued operations, net of income taxes	0	(153)	7,975	(894)			(135)	2,429
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Cash and cash equivalents									12,364
Time deposits									1,281
Accounts receivable, net									5,310
Inventories									4,029
Other current assets									1,826
Total current assets	0		0		24,810				24,810
Property and equipment, net									2,571
Goodwill									12,843
Other assets									(119)
Total assets									40,105
Accounts payable									705
Accrued liabilities									1,802
Other current liabilities									729
Non-current liabilities									467
Total liabilities									$ 3,703