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Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | $ 210,003 | $ 211,474
Intangibles, gross amount | 242,143 | 243,614
Definite-lived intangibles, accumulated amortization | (61,361) | (48,527)
Trade names [Member] |  |
Intangible Assets by Major Class [Line Items] |  |
Indefinite-lived intangibles, gross amount | 32,140 | 32,140
Customer relationships [Member] |  |
Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | 195,076 | 196,856
Definite-lived intangibles, accumulated amortization | (53,298) | (42,099)
Other definite-lived intangibles [Member] |  |
Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | 14,927 | 14,618
Definite-lived intangibles, accumulated amortization | $ (8,063) | $ (6,428)

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