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Allowance Accounts | 12 Months Ended
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Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract] |
Allowance Accounts | Allowance Accounts The following table sets forth the activity in our valuation accounts for each of the three years in the period ended December 31, 2015 (in thousands):
| Allowance for Uncollectible Accounts |  | Deferred Tax Asset Valuation Allowance
Balance at December 31, 2012 | $ | 5,152 |  |  | $ | 16,391 |
Additions (1) | 2,236 |  |  | — |
Adjustments (2) (3) | (5,154 | ) |  | 6,469 |
Balance at December 31, 2013 | 2,234 |  |  | 22,860 |
Additions (1) | 5,331 |  |  | — |
Deductions (4) | (2,830 | ) |  | — |
Adjustments | — |  |  | 216 |
Balance at December 31, 2014 | 4,735 |  |  | 23,076 |
Additions (1) | 3,275 |  |  | — |
Deductions (4) | (7,660 | ) |  | — |
Adjustments (5) | — |  |  | (21,140 | )
Balance at December 31, 2015 | $ | 350 |  |  | $ | 1,936 |
(1) | The increase in allowance for uncollectible accounts primarily reflects charges associated with the provision for uncertain collection of a portion of our existing trade receivables related to our Robotics segment.
(2) | The decrease in allowance for uncollectible accounts primarily reflects the reversal of a $4.0 million allowance against our trade receivables for work performed offshore India in 2007 as we collected the previously adjusted receivable balance pursuant to a settlement agreement.
(3) | The increase in valuation allowance includes $6.5 million related to our net operating losses generated in Australia.
(4) | The decrease in allowance for uncollectible accounts reflects the write-offs of trade receivables that are either settled or deemed uncollectible.
(5) | The decrease in valuation allowance primarily reflects a $20.6 million reduction related to the loss of deferred tax assets for net operating losses within our Australian subsidiaries.
See Note 2 for a detailed discussion regarding our accounting policy on accounts receivable and allowance for uncollectible accounts and Note 8 for a detailed discussion of the valuation allowance related to our deferred tax assets.

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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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