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Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Significant Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract] |  |  |
Change in Cash and Cash Equivalents due to reclass from Restricted Cash | $ 33,000 | $ 32,200 |
Cash paid during the period for: |  |  |
Interest | 37,542 | 25,115 | $ 16,501
Income taxes | 132,874 | 118,290 | 110,190
Significant non-cash investing and financing activities |  |  |
Other payables issued for purchased customer accounts | 10,029 | 1,930 | 1,425
Estimated acquisition earn-out payables and related charges | 36,899 | 33,229 | 5,091
Notes received on the sale of fixed assets and customer accounts | $ 7,755 | $ 6,340 | $ 1,108

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- Definition Notes Receivable on the Sale of Fixed Assets and Customer Accounts + References No definition available. + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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