Reportable Segments (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of net income to gross margin
Net income	$ 42,158	$ 45,261	$ 97,915	$ 128,556
Selling, general and administrative	94,806	93,581	283,096	269,460
Depreciation and amortization	98,256	81,305	295,734	244,702
Long-lived asset impairment	12,385	4,571	26,039	24,708
Restructuring charges	219		5,394
Interest expense	25,737	28,882	86,767	87,006
Equity in income of non-consolidated affiliates	(4,951)	(4,778)	(14,553)	(14,165)
Other (income) expense, net	4,663	(5,479)	(1,442)	(22,510)
Provision for income taxes	11,215	16,709	31,494	55,316
Income from discontinued operations, net of tax	(18,003)	(15,121)	(54,499)	(47,531)
Gross margin	$ 266,485	$ 244,931	$ 755,945	$ 725,542