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Trade and Other Receivables, Net (Tables) | 12 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Schedule of Trade and Other Receivables, Net | Trade and other receivables, net, consist of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Dollars in millions) |
Trade receivables from customers |  | $ | 95.1 |  |  | $ | 75.7 |
Interest receivable from invested customer trust funds |  |  | 1.8 |  |  |  | 1.3 |
Other |  |  | 11.7 |  |  |  | 9.5 |
Total gross receivables |  |  | 108.6 |  |  |  | 86.5 |
Less: reserve for sales adjustments |  |  | (4.4 | ) |  |  | (3.7 | )
Less: allowance for doubtful accounts |  |  | (3.1 | ) |  |  | (2.4 | )
Trade and other receivables, net |  | $ | 101.1 |  |  | $ | 80.4 |
Activity Related to Allowance for Doubtful Accounts | The activity related to the allowance for doubtful accounts was as follows:
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (Dollars in millions) |
Balance at beginning of year |  | $ | 2.4 |  |  | $ | 1.3 |  |  | $ | 1.3 |
Provision for doubtful accounts |  |  | 2.0 |  |  |  | 3.2 |  |  |  | 0.7 |
Charge-offs, net of recoveries |  |  | (1.3 | ) |  |  | (2.1 | ) |  |  | (0.7 | )
Balance at end of year |  | $ | 3.1 |  |  | $ | 2.4 |  |  | $ | 1.3 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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