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Identifiable Intangible Assets from Acquisitions - Summary of Identifiable Intangible Assets from Acquisitions (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 21,478 | $ 21,478
Accumulated Amortization | 2,349 | 781
Net | 19,129 | 20,697
Customer Relationships |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 12,368 | 12,368
Accumulated Amortization | 913 | 295
Net | 11,455 | 12,073
Technologies |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,879 | 5,879
Accumulated Amortization | 748 | 258
Net | 5,131 | 5,621
Non-compete Agreements |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,559 | 2,559
Accumulated Amortization | 560 | 184
Net | 1,999 | 2,375
Tradenames |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 672 | 672
Accumulated Amortization | 128 | 44
Net | $ 544 | $ 628

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