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Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
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Sep. 30, 2015 | Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 1,421,668 | $ 1,384,689
Accumulated Amortization | (663,572) | (600,047)
Net Carrying Value | 758,096 | 784,642
Purchased customer accounts |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 1,392,323 | 1,355,550
Accumulated Amortization | (636,906) | (574,285)
Net Carrying Value | $ 755,417 | $ 781,265
Weighted Average Life (Years) | 15 years | 14 years 10 months 24 days
Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 29,345 | $ 29,139
Accumulated Amortization | (26,666) | (25,762)
Net Carrying Value | $ 2,679 | $ 3,377
Weighted Average Life (Years) | 6 years 9 months 18 days | 6 years 9 months 18 days

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Details
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