Note 13 - Income Taxes - Components of Net Deferred Income Tax Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory valuation adjustments	$ 73,353	$ 98,141
Financial accruals	106,862	129,120
Federal net operating loss carryforwards	92,043	97,507
State net operating loss carryforwards	45,607	60,739
Tax credit carryforwards	2,347	1,246
Goodwill impairment charges	3,396	4,287
Other, net	9,226	6,310
Total deferred tax asset	332,834	397,350
Less: Valuation allowance	(2,456)	(1,156)
Net deferred tax asset	$ 330,378	$ 396,194