Detail of Certain Balance Sheet Accounts - Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventories of products:
Finished products	$ 323,524	$ 315,361
Work in progress	5,870	5,781
Raw materials	91,123	97,550
Inventories of products, gross	420,517	418,692
Inventory reserves	(6,817)	(8,052)
Total inventories of products, net	413,700	410,640
Other payables and accruals:
Employee related	23,794	35,015
Interest payable	13,839	2,201
Property, plant, and equipment accruals	9,758	10,982
Short-term operating lease liabilities	17,529	0
Other	43,569	52,497
Total other payables and accruals	108,489	100,695
Other long-term liabilities:
Pension and other post-retirement benefits	121,348	122,194
Other	59,170	60,699
Total other long-term liabilities	180,518	182,893
Supplemental Balance Sheet Information [Line Items]
Intangible assets	611,080	608,686
Less accumulated amortization	257,331	246,648
Intangible assets, net of accumulated amortization	353,749	362,038
Contractual agreements
Supplemental Balance Sheet Information [Line Items]
Intangible assets	261,939	262,624
Less accumulated amortization	71,235	65,958
Technology
Supplemental Balance Sheet Information [Line Items]
Intangible assets	145,435	145,698
Less accumulated amortization	63,509	62,019
Customer relationships
Supplemental Balance Sheet Information [Line Items]
Intangible assets	60,293	60,359
Less accumulated amortization	37,740	37,409
Tradenames/trademarks
Supplemental Balance Sheet Information [Line Items]
Intangible assets	80,994	80,557
Less accumulated amortization	44,117	42,797
Software
Supplemental Balance Sheet Information [Line Items]
Intangible assets	62,419	59,448
Less accumulated amortization	$ 40,730	$ 38,465