Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 78,630	$ 75,985
Work in process	67,175	62,115
Finished goods	10,365	11,580
Inventory, Gross, Total	156,170	149,680
Less progress payments	13,969	9,173
Total	$ 142,201	$ 140,507