Fair Value Measurements (Fair Value Assets (Liabilities) Measured On Recurring Basis) (Details) (USD $)	3 Months Ended				12 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts			$ 1,000
Forward currency exchange contracts	(396,000)		(372,000)		260,000
Nonqualified savings plan assets	10,336,000	[1]	8,352,000	[1]	8,264,000	[1]
Marketable securities	5,565,000	[2]	4,370,000	[2]	4,412,000	[2]
Total	15,505,000		12,351,000		12,936,000
Unrealized total losses recorded in accumulated other comprehensive income	100,000		800,000		800,000
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonqualified savings plan assets	10,336,000	[1]	8,352,000	[1]	8,264,000	[1]
Marketable securities	5,565,000	[2]	4,370,000	[2]	4,412,000	[2]
Total	15,901,000		12,722,000		12,676,000
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts			1,000
Forward currency exchange contracts	(396,000)		(372,000)		260,000
Total	(396,000)		(371,000)		260,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts
Forward currency exchange contracts
Nonqualified savings plan assets		[1]		[1]		[1]
Marketable securities		[2]		[2]		[2]
Total

[1] The non-qualified savings plan assets have an offsetting liability of equal amount, which is included in "Accounts payable and accrued expenses" in the Company's consolidated balance sheets.

[2] Unrealized total losses, net of tax, on these securities of $0.1 million, $0.8 million and $0.8 million as of March 31, 2012 and 2011, and December 31, 2011, respectively, are recorded in "Accumulated other comprehensive income (loss)" in the Company's consolidated statements of equity.