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Schedule II Valuation and Qualifying Accounts Schedule II Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts [Table Text Block] |
Column A |  | Column B |  | Column C |  | Column D |  | Column E
|  |  |  | Additions |  |  |  |
|  |  |  | (1) |  | (2) |  |  |  |
|  | Balance at the Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  |  |  | Balance at End of Period
Description |  |  |  |  | -Deductions- |
|  |  |  |  |  | Note (A) |  | Note (B) |  |
Accounts receivable — allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2017 |  | $ | 14,234 |  |  | $ | 1,403 |  |  | $ | 1,005 |  |  | $ | 1,093 |  |  | $ | 15,549 |
Year ended December 31, 2016 |  | $ | 14,435 |  |  | $ | 1,087 |  |  | $ | (760 | ) |  | $ | 528 |  |  | $ | 14,234 |
Year ended December 31, 2015 |  | $ | 15,961 |  |  | $ | 883 |  |  | $ | (2,302 | ) |  | $ | 107 |  |  | $ | 14,435 |
Deferred tax valuation allowance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2017 |  | $ | 10,730 |  |  | $ | 9,513 |  |  | $ | 72,170 |  |  | $ | 79,556 |  |  | $ | 12,857 |
Year ended December 31, 2016 |  | $ | 25,435 |  |  | $ | — |  |  | $ | — |  |  | $ | 14,705 |  |  | $ | 10,730 |
Year ended December 31, 2015 |  | $ | 36,263 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,828 |  |  | $ | 25,435 |
_______________________________________ Note (A) For accounts receivable, amounts comprise currency translation adjustments. For deferred tax valuation allowance in 2017, 2016, and 2015, amounts relate primarily to changes in foreign tax credit carryforwards and R&D credit carryforwards. Note (B) For accounts receivable, amounts represent excess of uncollectible balances written off over recoveries of accounts previously written off.

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- Definition The tabular disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). + References No definition available. + Details
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- References No definition available. + Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration