Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales of discontinued operations	$ 23,540	$ 27,885	$ 49,603
Income from discontinued operations	(3,806)	(2,886)	1,341
Other income (expense) from discontinued operations	(353)	(292)	(222)
Earnings (loss) from discontinued operations before income taxes	(4,159)	(3,178)	1,119
Income tax benefit/(expense)	1,235	792	(364)
Earnings (loss) from discontinued operations before gain/(loss) on disposal	(2,924)	(2,386)	755
Gain/(loss) on disposal of discontinued operations, before taxes	(7,567)	0	2,645
Income tax benefit/(expense)	2,583	420	(1,322)
Net gain (loss) on disposal of discontinued operations	(4,984)	420	1,323
Earnings (loss) from discontinued operations, net of taxes	(7,908)	(1,966)	2,078
Distribution Segment Mexico Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain (loss) on disposal of discontinued operations	(5,300)
Distribution Segment Canadian Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit/(expense)	$ (300)