Inventories Breakdown of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Inventory Disclosure [Abstract]
Finished goods	$ 280,886		$ 340,863
Raw materials	43,708		47,784
Stores, supplies and other	45,970		47,402
Total inventories	$ 370,564	[1]	$ 436,049

[1] As of June 30, 2014, $58.1 million of inventories (consisting primarily of finished goods) were classified as Assets of discontinued operations held for sale in the condensed consolidated balance sheets. See Note 15, “Discontinued Operations” for additional information.