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Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Detail) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Fair value of consideration transferred: |  |
Cash | $ 500,064 | $ 394,002
Notes issued to sellers |  | 13,460
Fair value of operations exchanged |  | 81,097
Consideration transferred | 565,074 | 545,517
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Accounts receivable | 12,817 | 19,312
Prepaid expenses and other current assets | 2,355 | 4,336
Property and equipment | 346,275 | 167,065
Indefinite-lived intangibles |  | 5,830
Other assets | 19 | 3,052
Deferred revenue | (4,169) | (9,657)
Other long-term liabilities | (15,532) | (1,080)
Deferred income taxes | (391) | (50,283)
Total identifiable net assets | 395,124 | 236,486
Goodwill | 169,950 | 309,031
Accounts Payable and Accrued Liabilities [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Accounts payable and accrued liabilities | (3,982) | (12,022)
Debt [Member] |  |
Fair value of consideration transferred: |  |
Liabilities incurred | 65,010 | 56,958
Contingent Consideration [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Other long-term liabilities | (11,669) | (35)
Contracts [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | 10,888 | 54,674
Customer Lists [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | 27,330 | 28,033
Other Intangibles [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | $ 31,183 | $ 27,261

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 + Details
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