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Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | $ 224,013 | $ 180,853
Accumulated depreciation and amortization | (71,698) | (56,585)
Property and equipment, net | 152,315 | 124,268
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | 9,958 | 9,958
Building and leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | $ 116,214 | 94,924
Building and leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 5 years |
Building and leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 39 years |
Computer equipment and purchased software |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | $ 72,531 | 55,627
Computer equipment and purchased software | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 3 years |
Computer equipment and purchased software | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 5 years |
Furniture and fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | $ 24,834 | 19,897
Furniture and fixtures | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 5 years |
Transportation equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Gross | $ 476 | $ 447
Transportation equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, Useful lives | 5 years |

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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