Discontinued Operations Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 0	$ 0	$ (6,780)	$ 2,040	$ (6,200)	$ 11,140	$ 11,760	$ 5,690	$ (4,740)	$ 22,390	$ 20,830
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue									300,900	615,260	595,160
Disposal Group, Including Discontinued Operation, Costs of Goods Sold									(227,860)	(468,060)	(467,800)
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)									73,040	147,200	127,360
Disposal Group, Including Discontinued Operations, Selling, General and Administrative Expenses									(72,360)	(111,900)	(104,040)
Disposal Group, Including Discontinued Operation, Operating Income (Loss)									680	35,300	23,320
Disposal Group, Including Discontinued Operation, Interest Expense									(2,540)	(5,430)	(3,060)
Disposal Group, Including Discontinued Operation, Other Expense									(1,970)	4,170	2,370
Disposal Group, Including Discontinued Operations, Nonoperating Expense									(4,510)	(1,260)	(690)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									(3,830)	34,040	22,630
Discontinued Operation, Tax Effect of Discontinued Operation									(910)	(11,650)	(1,800)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									$ (4,740)	$ 22,390	$ 20,830