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Supplemental Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2017
SUPPLEMENTAL DISCLOSURES [Abstract] |
Allowance for Doubtful Accounts | Analysis of Allowances for Doubtful Accounts: ($ in millions)
| For the Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Allowance for Doubtful Accounts |  |  |  |  |
Beginning balance | $ | 0.8 |  |  | $ | 0.4 |  |  | $ | 0.3 |
Bad debt expense | 0.8 |  |  | 0.4 |  |  | 0.2 |
Write-offs and discounts | (0.6 | ) |  | — |  |  | (0.1 | )
Currency translation | — |  |  | — |  |  | — |
Ending balance | $ | 1.0 |  |  | $ | 0.8 |  |  | $ | 0.4 |
Schedule of Cash Flow, Supplemental Disclosures | Supplemental Cash Flow Information ($ in millions)
| For the Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Interest paid | $ | 22.7 |  |  | $ | 13.3 |  |  | $ | 7.8 |
Income taxes paid | 38.1 |  |  | 31.9 |  |  | 9.3 |
Capital spending in accounts payable and accrued liabilities | 7.7 |  |  | 8.8 |  |  | 2.6 |
Deferred contingent business acquisition consideration | 8.6 |  |  | — |  |  | — |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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