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Intangible assets, net - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 108,798 | $ 88,149
Accumulated amortization | (9,379) | (704)
Net intangible assets | $ 99,419 | $ 87,445
Purchased IP and Capitalized Litigation Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 10 years | 10 years
Gross amount |  | $ 1,659
Accumulated amortization |  | (34)
Net intangible assets |  | 1,625
Software Developed for Internal Use [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 8,972 | 2,571
Accumulated amortization | (321) | (50)
Net intangible assets | $ 8,651 | $ 2,521
Software Developed for Internal Use [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 3 years | 3 years
Software Developed for Internal Use [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 10 years | 10 years
Acquired Proprietary Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 5 years | 5 years
Gross amount | $ 13,532 | $ 10,716
Accumulated amortization | (1,983) | (133)
Net intangible assets | 11,549 | 10,583
Customer Relationship [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 34,986 | 30,875
Accumulated amortization | (3,643) | (272)
Net intangible assets | $ 31,343 | $ 30,603
Customer Relationship [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 7 years | 7 years
Customer Relationship [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 10 years | 10 years
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 20 years | 20 years
Gross amount | $ 18,057 | $ 16,357
Accumulated amortization | (691) | (50)
Net intangible assets | $ 17,366 | $ 16,307
Domain Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 20 years | 20 years
Gross amount | $ 191 | $ 191
Accumulated amortization | (8) | (1)
Net intangible assets | 183 | 190
Acquired Databases [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 31,292 | 25,052
Accumulated amortization | (2,452) | (155)
Net intangible assets | $ 28,840 | $ 24,897
Acquired Databases [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 5 years | 5 years
Acquired Databases [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 10 years | 10 years
Non-competition Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 1,768 | $ 728
Accumulated amortization | (281) | (9)
Net intangible assets | $ 1,487 | $ 719
Non-competition Agreements [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 2 years | 2 years
Non-competition Agreements [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life of intangible assets | 5 years | 5 years

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