Provision For Income Taxes (Components Of Provision For Income Taxes) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Provision For Income Taxes [Abstract]
Federal, Current	$ 3,338,000		$ 4,880,000	$ 6,005,000
State and local, Current	462,000		942,000	943,000
Foreign, Current	12,000		2,515,000	2,436,000
Current income tax expense (benefit), Total	3,812,000		8,337,000	9,384,000
Federal, Deferred	13,018,000	[1]	4,160,000	1,897,000
State and local, Deferred	597,000		346,000	343,000
Foreign, Deferred	(261,000)		317,000	130,000
Deferred income tax expense (benefit), Total	13,354,000		4,823,000	2,370,000
Provision for income taxes	17,166,000		13,160,000	11,754,000
Write-off of indirect benefits on uncertain tax benefits lapsed due to the statute of limitations	$ 5,500,000

[1] $5.5 million relates to the reversal of indirect benefits on uncertain tax benefits which lapsed due to the statute of limitations.