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Depreciation and Amortization - Depreciation and Amortization Expense Excluded from Operating Expenses in its Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Depreciation and Amortization Expense [Line Items] |  |  |  |
Depreciation and amortization | $ 63,951 | $ 55,089 | $ 187,150 | $ 167,251
Direct Advertising Expenses [Member] |  |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |  |
Depreciation and amortization | 59,556 | 51,360 | 175,871 | 155,832
General and Administrative Expenses [Member] |  |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |  |
Depreciation and amortization | 942 | 927 | 3,203 | 2,935
Corporate Expenses [Member] |  |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |  |
Depreciation and amortization | $ 3,453 | $ 2,802 | $ 8,076 | $ 8,484

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- Definition Depreciation and amortization expense. + References No definition available. + Details
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- Definition The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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