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Acquisitions - Additional Information (Detail) - USD ($) |  | 5 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 14, 2016
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration |  |  |  | $ 112,795,000 | $ 44,614,000 |
Value of common stock issued |  |  |  | 247,575,000 | 14,135,000 |
Working capital adjustment |  |  |  | 425,000 |  |
Fair value of acquired finite lived intangible assets |  | $ 120,080,000 |  | $ 120,080,000 | 19,829,000 | $ 11,000,000,000
Finite lived intangible asset, useful life |  |  | 16 years | 16 years |  |
Goodwill |  | 327,333,000 | $ 326,735,000 | $ 327,333,000 | $ 59,548,000 |
Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  | 14 years | 14 years |  |
Technology - developed |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  | 19 years | 19 years |  |
Spectrum Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration | $ 122,932,000 |  |  |  |  |
Shares issued for business acquisition | 6,153,995 |  |  |  |  |
Value of common stock issued | $ 247,575,000 |  |  |  |  |
Working capital adjustment | 425,000 |  |  |  |  |
Business combination, consideration transferred | 370,932,000 |  |  |  |  |
Fair value of net assets acquired | 370,932,000 |  |  |  |  |
Goodwill | 265,722,000 |  |  |  |  |
Goodwill expected to be deductible for tax purposes amount | 0 |  |  |  |  |
Business acquisition, revenue |  | $ 19,400,000 |  |  |  |
Spectrum Inc. | Selling, general and administrative |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 2,900,000 | $ 7,100,000 |  |
Spectrum Inc. | Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of acquired finite lived intangible assets | $ 78,400,000 |  |  |  |  |
Finite lived intangible asset, useful life | 15 years |  |  |  |  |
Spectrum Inc. | Technology - developed |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of acquired finite lived intangible assets | $ 38,560,000 |  |  |  |  |
Finite lived intangible asset, useful life | 20 years |  |  |  |  |
Spectrum Inc. | Non-compete agreements |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of acquired finite lived intangible assets | $ 960,000 |  |  |  |  |
Finite lived intangible asset, useful life | 3 years |  |  |  |  |
Spectrum Inc. | Trademark |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of acquired finite lived intangible assets | $ 2,160,000 |  |  |  |  |
Minimum | Spectrum Inc. | Trademark |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible asset, useful life | 2 years |  |  |  |  |
Maximum | Spectrum Inc. | Trademark |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible asset, useful life | 20 years |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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