Discontunued Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales of ASMP	$ 2,462	$ 4,782
Discontinued Operation, Tax Effect of Discontinued Operation	(133)	(257)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	213	381
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	1,877	0
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation	(723)	0
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	1,154	0
Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operation, Net of Tax	1,367	381
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.16	$ 0.05
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	346	638
ASMP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	346	667
Other discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ 0.00
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	$ 0	$ (29)