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Schedule II Valuation of Qualifying Accounts and Reserves | 12 Months Ended
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Dec. 31, 2014
Schedule II Valuation and Qualifying Accounts and Reserves [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] |
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (In Thousands, Except Per Share Data)
Column A |  | Column B |  | Column C |  | Column D |  | Column E
|  |  |  | Charges To |  |  |  |
|  | Balance At |  | Cost |  |  |  |  |  | Balance
|  | Beginning |  | And |  | Other |  |  |  | At End
Description |  | of Period |  | Expense |  | Accounts (1) |  | Deductions |  | of Period
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2014 |  | $ | 1,028 |  |  | $ | 466 |  |  | $ | — |  |  | $ | 232 |  |  | $ | 1,262 |
Year ended December 31, 2013 |  | 829 |  |  | (27 | ) |  | 238 |  |  | 12 |  |  | 1,028 |
Year ended December 31, 2012 |  | 791 |  |  | 205 |  |  | — |  |  | 167 |  |  | 829 |
(1) Addition to allowance for doubtful accounts following acquisition of GTI. See accompanying Report of Independent Registered Public Accounting Firm.

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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 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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