CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Reclassification adjustment for settled hedge contracts, income taxes	$ 22,454	$ 91,870	$ 33,500
Changes in fair value of hedge contracts, income taxes	1,803	(34,890)	(103,963)
Pension and postretirement benefits:
Net gain / (loss), income taxes	(2,977)	(815)	9,085
Settlement, income taxes	0	0	(2,143)
Amortization of net obligation at transition, income taxes	0	0	(245)
Amortization of prior service cost, income taxes	0	(87)	(406)
Amortization of net loss, income taxes	(255)	(5,324)	(4,257)
Foreign currency translation adjustment, income taxes	$ 0	$ 0	$ (34)