Inventories - Major Classes of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Inventory [Line Items]
Raw materials	$ 81,070	$ 92,072
Work-in-process	35,375	34,391
Finished goods	112,488	110,280
Perishable tooling and supplies	2,349	2,493
Gross inventories	231,282	239,236
Obsolescence and other reserves	(21,591)	(23,954)
Net inventories	$ 209,691	$ 215,282