Note 15 - Income Taxes (Detail) - Deferred Income Taxes (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Inventory (excluding LIFO reserve)	$ 2,039	$ 1,674
Net operating loss and tax credit carryforwards	3,167	3,481
Allowance for doubtful accounts	615	664
Accrued expenses	7,592	6,289
Other	102	450
	13,515	12,558
Valuation reserve	(1,200)	(401)
Total deferred tax assets	12,315	12,157
LIFO reserve	(5,417)	(6,358)
Property and equipment	(26,962)	(26,534)
Intangibles	(15,416)	(15,874)
Other		(450)
Total deferred tax liabilities	(47,795)	(49,216)
Deferred tax liabilities, net	$ (35,480)	$ (37,059)