Receivables, net (Net components of receivables) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Receivables [Abstract]
Customers, trade	$ 1,280,046	$ 1,076,824
Income tax receivable	7,017	7,590
Other	57,164	55,498
Receivables, gross	1,344,227	1,139,912
Less: allowance for discounts, returns, claims and doubtful accounts	82,419	77,037
Receivables, net	$ 1,261,808	$ 1,062,875