Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Accounts receivable	$ 243	$ 269
Inventory	5,663us-gaap_DeferredTaxAssetsInventory	2,853us-gaap_DeferredTaxAssetsInventory
Accruals not currently deductible for tax purposes	9,915	8,844
Net operating loss and credit carryforwards	12,183	3,972
Capital loss carryforward	3,088	2,779
Depreciation	10,498	1,070
Equity compensation	3,662	3,157
Asset impairments	732	732
Purchased intangibles assets	0	1,439
Other, net	5,549us-gaap_DeferredTaxAssetsOther	2,976us-gaap_DeferredTaxAssetsOther
Gross deferred tax assets	51,533us-gaap_DeferredTaxAssetsGross	28,091us-gaap_DeferredTaxAssetsGross
Valuation allowance	(11,104)	(5,435)
Total deferred tax assets	40,429us-gaap_DeferredTaxAssetsNet	22,656us-gaap_DeferredTaxAssetsNet
Depreciation	0	(3,245)
Purchased intangible assets	(77,149)	(601)
Gross deferred tax liabilities	(77,149)us-gaap_DeferredIncomeTaxLiabilities	(3,846)us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities	(36,720)us-gaap_DeferredTaxLiabilities
Net deferred tax assets		$ 18,810us-gaap_DeferredTaxAssetsLiabilitiesNet

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to purchased intangibles which can only be realized if sufficient taxable income is generated in future periods to enable the deduction to be taken.

No definition available.