Derivative Instruments and Hedging Activities Notional Amounts (Details) € in Thousands, ¥ in Thousands, ¥ in Thousands, CAD in Thousands, BTU in Thousands, BRL in Thousands, AUD in Thousands, $ in Thousands	Dec. 31, 2017 CAD BTU	Dec. 31, 2017 EUR (€) BTU	Dec. 31, 2017 USD ($) BTU	Dec. 31, 2017 AUD BTU	Dec. 31, 2017 JPY (¥) BTU	Dec. 31, 2017 CNY (¥) BTU	Dec. 31, 2017 BRL BTU	Jul. 02, 2017 CAD BTU	Jul. 02, 2017 EUR (€) BTU	Jul. 02, 2017 USD ($) BTU	Jul. 02, 2017 AUD BTU	Jul. 02, 2017 JPY (¥) BTU	Jul. 02, 2017 CNY (¥) BTU	Jul. 02, 2017 BRL BTU
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount | $			$ 110,000							$ 95,000
Australian Dollar, Sell [Member]
Derivative [Line Items]
Derivative, Notional Amount | AUD				AUD 41,388							AUD 39,196
Brazilian Real, Buy [Member] [Domain]
Derivative [Line Items]
Derivative, Notional Amount | BRL							BRL 20,437							BRL 28,137
Canadian Dollar, Sell [Member]
Derivative [Line Items]
Derivative, Notional Amount | CAD	CAD 15,840							CAD 14,725
Chinese Renminbi, Buy [Member] [Domain]
Derivative [Line Items]
Derivative, Notional Amount						¥ 107,410							¥ 74,950
Euro, Sell [Member]
Derivative [Line Items]
Derivative, Notional Amount | €		€ 46,407							€ 31,240
Japanese Yen, Buy [Member]
Derivative [Line Items]
Derivative, Notional Amount					¥ 935,850							¥ 570,000
Natural Gas [Member]
Derivative [Line Items]
Nonmonetary Notional Amount Derivatives (in ones) | BTU	9,498	9,498	9,498	9,498	9,498	9,498	9,498	11,307	11,307	11,307	11,307	11,307	11,307	11,307