Accrued Expenses (Schedule Of Accrued Expenses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accrued Expenses [Abstract]
Employee benefits, payroll and related taxes	$ 67,727	$ 48,978
Taxes other than income taxes and payroll taxes	19,834	22,294
Deferred revenue	18,819	14,914
Accrued sales commissions	9,525	3,827
Accrued interest payable	8,075	8,211
Other	51,277	45,460
Total	$ 175,257	$ 143,684