Acquisitions - Summary of Estimates of Fair Value of the Assets Acquired and the Liabilities Assumed as of the Acquisition Date (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 18, 2015
Intangible assets:
Goodwill	$ 41,466	$ 41,466
Buck's Acquisition Company, LLC [Member]
Assets acquired:
Inventories			$ 6,598
Property, plant & equipment			231
Total tangible assets			6,829
Intangible assets:
Intangible assets			1,380
Goodwill			1,526
Total assets acquired			$ 9,735