Fair Value Measurements (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Assets:
Cash Equivalents	$ 11,300	$ 243,500
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	11,267	243,514
Foreign currency forward contracts	149	1,763
Total Assets at Fair Value	11,416	245,277
Liabilities:
Interest rate swap agreements	9,455	5,842
Foreign currency forward contracts	1,152	305
Total Liabilities at Fair Value	10,607	6,147
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	0	230,000
Foreign currency forward contracts	0	0
Total Assets at Fair Value	0	230,000
Liabilities:
Interest rate swap agreements	0	0
Foreign currency forward contracts	0	0
Total Liabilities at Fair Value	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets:
Cash Equivalents	11,267	13,514
Foreign currency forward contracts	149	1,763
Total Assets at Fair Value	11,416	15,277
Liabilities:
Interest rate swap agreements	9,455	5,842
Foreign currency forward contracts	1,152	305
Total Liabilities at Fair Value	10,607	6,147
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets:
Cash Equivalents	0	0
Foreign currency forward contracts	0	0
Total Assets at Fair Value	0	0
Liabilities:
Interest rate swap agreements	0	0
Foreign currency forward contracts	0	0
Total Liabilities at Fair Value	$ 0	$ 0

- Definition

Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash equivalents may be reported as cash equivalents, while legally restricted equivalents held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular equivalents are not generally reported as part of unrestricted cash equivalents.

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