Schedule IV (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Opening Balance	$ 8,547	$ 9,771	$ 7,252
Charged to Costs and Expenses	2,501	2,350	2,006
Charged to Other	467	(411)	1,444
Deductions	446	3,163	931
Closing Balance	11,069	8,547	9,771
LIFO
Valuation and Qualifying Accounts Disclosure [Line Items]
Opening Balance	17,908	18,146	19,476
Charged to Costs and Expenses	986	(238)	(1,330)
Closing Balance	18,894	17,908	18,146
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Opening Balance	63,231	60,856	61,563
Charged to Costs and Expenses	2,248	828	2,315
Charged to Other	(5,686)	5,367	831
Deductions	10,329	3,820	3,853
Closing Balance	$ 49,464	$ 63,231	$ 60,856