Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Accounts receivable	$ 64	$ 243
Inventory	5,491	5,663
Accruals not currently deductible for tax purposes	6,661	9,915
Net operating loss and credit carryforwards	12,247	12,183
Capital loss carryforward	2,141	3,088
Depreciation	21,834	10,498
Equity compensation	4,673	3,662
Asset impairments	1,751	732
Other, net	3,578	5,549
Gross deferred tax assets	58,440	51,533
Valuation allowance	(12,724)	(11,104)
Total deferred tax assets	45,716	40,429
Purchased intangible assets	(68,610)	(77,149)
Gross deferred tax liabilities	(68,610)	(77,149)
Total deferred tax liabilities	$ (22,894)	$ (36,720)