Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Oct. 31, 2013	Jan. 15, 2013	Dec. 31, 2012
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Accounts receivable			$ 10,327
Inventory			14,144
Property and equipment			2,426
Intangible assets			37,817
Other assets			1,782
Goodwill	71,156		26,578	44,578
Total assets acquired			93,074
Accounts payable			4,768
Accrued expenses			6,217
Deferred tax liabilities			384
Other liabilities assumed			932
Total liabilities assumed			12,301
Total net assets acquired		$ 80,773	$ 80,773