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Other Intangible Assets - Carrying Amount of Other Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 574,732 | $ 547,456
Accumulated amortization | (262,673) | (212,828)
Net carrying amount | 312,059 | $ 334,628
Customer relationships [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years |  | 14 years
Gross amount | 322,632 | $ 312,735
Accumulated amortization | (117,963) | (95,482)
Net carrying amount | $ 204,669 | 217,253
Customer relationships [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 10 years |
Customer relationships [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 14 years |
Trademarks [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 39,950 | 39,950
Accumulated amortization | (18,186) | (14,722)
Net carrying amount | $ 21,764 | $ 25,228
Trademarks [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 10 years | 10 years
Trademarks [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 15 years | 15 years
Software packages [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 155,611 | $ 138,232
Accumulated amortization | (106,735) | (86,605)
Net carrying amount | $ 48,876 | $ 51,627
Software packages [Member] | Minimum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 3 years | 3 years
Software packages [Member] | Maximum [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 10 years | 10 years
Non-compete agreement [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life in years | 15 years | 15 years
Gross amount | $ 56,539 | $ 56,539
Accumulated amortization | (19,789) | (16,019)
Net carrying amount | $ 36,750 | $ 40,520

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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