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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Franchising Program (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) franchise | Dec. 31, 2016 USD ($) franchise | Dec. 31, 2015 USD ($) franchise
Franchisor Disclosure [Line Items] |  |  |
Notes receivable from franchises, maximum period | 5 years |  |
Deferred franchise fees | $ 3.4 | $ 3.0 | $ 2.9
Revenue from franchises | 5.4 | 5.1 | 4.9
Maximum exposure to loss relating to the franchises | 2.5 | 2.0 | $ 1.5
Orkin franchises |  |  |
Franchisor Disclosure [Line Items] |  |  |
Notes receivable from franchises | $ 5.9 | $ 5.0 |
Critter Control |  |  |
Franchisor Disclosure [Line Items] |  |  |
Number of franchises | franchise | 89 | 94 |
Notes receivable from franchises | $ 0.2 | $ 0.3 |
United States |  |  |
Franchisor Disclosure [Line Items] |  |  |
Number of franchises | franchise | 47 | 50 | 51
International |  |  |
Franchisor Disclosure [Line Items] |  |  |
Number of franchises | franchise | 81 | 70 | 48

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- Definition Revenue earned during the period from consideration (often a percentage of the franchisee's sales) received for the right to operate a business using the entity's name, merchandise, services, methodologies, promotional support, marketing, and supplies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 605 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68058139&loc=d3e68564-108043 + Details
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- Definition The number of franchised outlets in operation at the balance sheet date when there are significant changes in franchisor-owned outlets or franchised outlets during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 605 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68064525&loc=d3e68639-108044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68051204&loc=SL51750552-203207 + Details
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