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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 |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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