Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Accounts receivable	$ 269	$ 389
Inventory	2,853	2,643
Accruals not currently deductible for tax purposes	8,844	10,054
Net operating loss and credit carryforwards	3,972	2,669
Capital loss carryforward	2,779	3,105
Depreciation	1,070	2,870
Equity compensation	3,157	3,155
Asset impairments	732	1,021
Purchased intangibles assets	1,439	1,396
Other, net	2,976	3,604
Gross deferred tax assets	28,091	30,906
Valuation allowance	(5,435)	(4,990)
Total deferred tax assets	22,656	25,916
Depreciation	(3,245)	(1,252)
Purchased intangible assets	(601)	(692)
Total deferred tax liabilities	(3,846)	(1,944)
Net deferred tax assets	$ 18,810	$ 23,972