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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts |
| 2017 |  | 2016 |  | 2015
| (In thousands)
Allowance for doubtful accounts: |
Balance at beginning of year | $ | 5,610 |  |  | $ | 8,189 |  |  | $ | 7,821 |
Additions— |  |  |  |  |
Charged to costs and expenses (2) | 1,649 |  |  | 1,471 |  |  | 1,676 |
Deductions— |  |  |  |  |
Deductions from reserves, net (1)(2) | 1,719 |  |  | 4,050 |  |  | 1,308 |
Balance at end of year | 5,540 |  |  | 5,610 |  |  | 8,189 |
Income tax valuation allowance: |  |  |  |  |
Balance at beginning of year | $ | 5,303 |  |  | $ | 5,153 |  |  | $ | 3,763 |
Additions— |  |  |  |  |
Charged to costs and expenses | 906 |  |  | 3,095 |  |  | 1,390 |
Deductions— |  |  |  |  |
Deductions from reserves (3) | 1,650 |  |  | 2,945 |  |  | — |
Balance at end of year | $ | 4,559 |  |  | $ | 5,303 |  |  | $ | 5,153 |
(1) | Bad debts written off, net of recoveries.
(2) | Activity for 2017, 2016 and 2015 includes currency translation gains (losses) of $285, $(203) and $(535), respectively.
(3) | Activity for 2017, 2016 and 2015 includes currency translation gains of $248, $113 and $392, respectively.

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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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- References No definition available. + Details
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