v2.4.0.6

Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Significant Accounting Policies [Abstract] |
Summary of allowance for losses progression |
Allowance for Losses Progression (In Thousands of Dollars) |  | 2012 |  |  | 2011 |  |  | 2010 |
Beginning balance January 1 |  | $ | 2,102 |  |  | $ | 2,582 |  |  | $ | 2,278 |
(Write offs) of bad debts, net of collections of previous write offs |  |  | (38 | ) |  |  | (480 | ) |  |  | 4 |
Bad debt provision |  |  | — |  |  |  | — |  |  |  | 300 |
Ending balance at December 31 |  | $ | 2,064 |  |  | $ | 2,102 |  |  | $ | 2,582 |

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- Definition Table showing the progression of the allowance for losses on doubtful accounts of trade receivables. + References No definition available. + Details
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