Acquired Intangible Assets and Weighted Average Amortization Periods (Detail) - USD ($) $ in Thousands			12 Months Ended
	Apr. 28, 2014	Mar. 18, 2013	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total			$ 64,359
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total			$ 9,247
Weighted Average Life			15 years
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total			$ 44,401
Weighted Average Life			12 years
Unpatented technology and other
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total			$ 10,711
Weighted Average Life			8 years
Aegis
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total	$ 8,770
Aegis | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total	$ 3,304
Weighted Average Life	15 years
Aegis | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total	$ 4,393
Weighted Average Life	14 years
Aegis | Unpatented technology and other
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total	$ 1,073
Weighted Average Life	8 years
FTL
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total		$ 13,016
FTL | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total		$ 1,005
Weighted Average Life		15 years
FTL | Non-Compete Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total		$ 224
Weighted Average Life		3 years
FTL | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total		$ 10,950
Weighted Average Life		9 years
FTL | Unpatented technology and other
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, Total		$ 837
Weighted Average Life		8 years