Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 79,150	$ 75,985
Work in process	68,746	62,115
Finished goods	8,766	11,580
Inventory, Gross, Total	156,662	149,680
Less progress payments	11,194	9,173
Total	$ 145,468	$ 140,507