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Schedule II - Valuation and Qualifying Accounts Schedule II Valuation and Qualifying Accounts (Notes) | 12 Months Ended
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Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | Schedule II -Valuation and Qualifying Accounts The roll forward of valuation accounts were as follows:
| (Dollars in thousands)
Description | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Deductions |  | Balance at End of Period
Allowance for doubtful accounts: (1) |  |  |  |  |  |  |
Year ended December 31, 2019 | $ | 549 |  |  | $ | 623 |  |  | $ | (579 | ) |  | $ | 593 |
Year ended December 31, 2018 | $ | 476 |  |  | $ | 695 |  |  | $ | (622 | ) |  | $ | 549 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |
Year ended December 31, 2019 | $ | 2,569 |  |  | $ | — |  |  | $ | (1,334 | ) |  | $ | 1,235 |
Year ended December 31, 2018 | $ | 2,556 |  |  | $ | 13 |  |  | $ | — |  |  | $ | 2,569 |
(1) | Deductions reflect uncollected receivables written off, net of recoveries and translation adjustments.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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