Fair Value Measurements (Summary Of Fair Value Hierarchy For Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets- Foreign currency forwards	$ 193	[1]	$ 709	[1]
Financial Assets-Trading securities held in deferred compensation plan	6,269	[2]	8,175	[2]
Financial Assets-Total	6,462		8,884
Financial Liabilities-Foreign currency forwards	2,029	[1]	1,884	[1]
Financial Liabilities-Interest rate swaps	855	[3]	1,560	[3]
Financial Liabilities-Phantom stock plan	5,647	[4]	5,043	[4]
Financial Liabilities-Deferred compensation plan	6,269	[5]	8,175	[5]
Financial Liabilities-Total	14,800		16,662
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets-Trading securities held in deferred compensation plan	6,269	[2]	8,175	[2]
Financial Assets-Total	6,269		8,175
Financial Liabilities-Deferred compensation plan	6,269	[5]	8,175	[5]
Financial Liabilities-Total	6,269		8,175
Significant Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets- Foreign currency forwards	193	[1]	709	[1]
Financial Assets-Total	193		709
Financial Liabilities-Foreign currency forwards	2,029	[1]	1,884	[1]
Financial Liabilities-Interest rate swaps	855	[3]	1,560	[3]
Financial Liabilities-Phantom stock plan	5,647	[4]	5,043	[4]
Financial Liabilities-Total	8,531		8,487
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets- Foreign currency forwards		[1]		[1]
Financial Assets-Trading securities held in deferred compensation plan		[2]		[2]
Financial Assets-Total
Financial Liabilities-Foreign currency forwards		[1]		[1]
Financial Liabilities-Interest rate swaps		[3]		[3]
Financial Liabilities-Phantom stock plan		[4]		[4]
Financial Liabilities-Deferred compensation plan		[5]		[5]
Financial Liabilities-Total

[1] Based on internally-developed models that use as their basis readily observable market parameters such as current spot and forward rates, and the LIBOR index.

[2] Based on the observable price of publicly traded mutual funds which, in accordance with FASB ASC 710, Compensation — General, are classified as "Trading" securities and accounted for using the mark-to-market method.

[3] Measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curves as of December 31, 2011 and 2010, respectively. The present value calculation uses discount rates that have been adjusted to reflect the credit quality of the Company and its counterparties.

[4] Based on the price of the Company's common stock.

[5] Based on the fair value of the investments in the deferred compensation plan.