Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Apr. 02, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets
Accounts receivable, Fair Value	$ 346,941	$ 322,976	$ 396,035
Liabilities
Accounts payable, Fair Value	143,798	141,797	164,721
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Level 1 [Member]
Liabilities
Short-term debt, Fair Value	74,872	43,021	146,423
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Level 2 [Member]
Assets
Open foreign currency exchange contracts, Fair Value	1,287	5,587	376
Interest rate cap	6,047	6,276
Liabilities
Open foreign currency exchange contracts, Fair Value	1,148	532	7,133
2011 Term loan, Current Portion	2,000	2,000
2011 term loan	196,500	197,000
Fair Value [Member]
Assets
Accounts receivable, Fair Value	346,941	322,976	396,035
Liabilities
Accounts payable, Fair Value	143,798	141,797	164,721
Fair Value [Member] | Level 1 [Member]
Liabilities
Short-term debt, Fair Value	74,872	43,021	146,423
Fair Value [Member] | Level 2 [Member]
Assets
Open foreign currency exchange contracts, Fair Value	1,287	5,587	376
Interest rate cap	6,047	6,276
Liabilities
Open foreign currency exchange contracts, Fair Value	1,148	532	7,133
2011 Term loan, Current Portion	1,985	1,980
2011 term loan	$ 195,026	$ 195,030