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BUSINESS COMBINATION - CONSIDERATION PAID (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 04, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Assets acquired and liabilities assumed |  |  |  |
Goodwill |  | $ 327.8 | $ 327.8 |
Repayments of Span Alaska debt |  |  |  | $ 81.9
Estimated future benefit payments |  |  |  |
Quarterly payments to ILA-PRSSA over an estimated period |  | 1.0 |  |
Span Alaska |  |  |  |
Business acquisition |  |  |  |
Percentage interest acquired | 100.00% |  |  |
Total cash consideration |  |  |  |
Membership interests | $ 117.0 |  |  |
Total debt assumed | 81.9 |  |  |
Total payments | 198.9 |  |  |
Assets acquired and liabilities assumed |  |  |  |
Cash and cash equivalents | 4.4 |  |  |
Accounts receivable | 11.1 |  |  |
Prepaid and other current assets | 0.9 |  |  |
Property and equipment | 8.1 |  |  |
Intangibles – Customer relationships | 79.3 |  |  |
Intangibles – Trade name | 27.3 |  |  |
Other long-term assets | 0.1 |  |  |
Accounts payable | (3.3) |  |  |
Accruals and other current liabilities | (6.4) |  |  |
Capital lease obligations | (1.2) |  |  |
Span Alaska's debt | (81.9) |  |  |
Total identifiable assets less liabilities | 38.4 |  |  |
Goodwill | $ 78.6 |  |  |
Condensed Consolidated Statements of Income and Comprehensive Income |  |  |  |
Operating revenue |  | 66.5 | 59.1 | 22.8
Operating Income |  | $ 16.7 | 12.8 | $ 3.5
One-time acquisition related costs |  |  | $ 3.0 |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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