v3.3.1.900

ALLOWANCE FOR DOUBTFUL ACCOUNTS | 12 Months Ended
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Dec. 31, 2015
Accounts Receivable Additional Disclosures [Abstract] |
Allowance for Doubtful Accounts [Text Block] | ALLOWANCE FOR DOUBTFUL ACCOUNTS The changes in the allowance for doubtful accounts consisted of the following:
| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
| (Thousands of Dollars)
Balance as of beginning of year | $ | 7,808 |  |  | $ | 1,224 |  |  | $ | 808 |
Increase in allowance, net | 965 |  |  | 7,649 |  |  | 1,039 |
Accounts charged against the allowance | (300 | ) |  | (1,065 | ) |  | (625 | )
Foreign currency translation | — |  |  | — |  |  | 2 |
Balance as of end of year | $ | 8,473 |  |  | $ | 7,808 |  |  | $ | 1,224 |

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- Definition The entire disclosure for allowance for credit losses. + References No definition available. + Details
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