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Components of Inventory (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory [Line Items]    
Finished goods $ 134,564us-gaap_InventoryFinishedGoodsNetOfReserves $ 108,340us-gaap_InventoryFinishedGoodsNetOfReserves
Work in process 1,887us-gaap_InventoryWorkInProcessNetOfReserves 1,966us-gaap_InventoryWorkInProcessNetOfReserves
Raw materials 1,473us-gaap_InventoryRawMaterialsNetOfReserves 2,485us-gaap_InventoryRawMaterialsNetOfReserves
Total $ 137,924us-gaap_InventoryNet $ 112,791us-gaap_InventoryNet