Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Doubtful accounts	$ 3,245	$ 541
Insurance (primarily product liability)	2,412	2,306
Vacation	961	951
Environmental	745	894
Goodwill and other intangibles	697	859
Other	846	589
Total deferred tax assets	8,906	6,140
Depreciation	7,339	9,366
Other	29	39
Total deferred tax liabilities	7,368	9,405
Net deferred tax assets (liabilities)	$ 1,538	$ (3,265)