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Pension benefits (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amortization of transition obligation | $ 112 | $ 90 | $ 89
Actuarial loss | (185) | (228) | (373)
Totals | (73) | (138) | (284)
Amounts in accumulated other comprehensive income (loss) not yet reflected in net periodic pension cost, net of taxes: |  |  |
Actuarial gain | 178 | 173 |
Transition obligation | (294) | (216) |
Totals | (116) | (43) |
Amounts in accumulated other comprehensive income (loss) expected to be amortized in 2014 net periodic pension cost, net of taxes: |  |  |
Transition obligation | 43 |  |
Totals | $ 43 |  |

X
- Definition Amount of accumulated other comprehensive income (loss) not reflected in net periodic pension cost, net of tax. + References No definition available. + Details
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- Definition Amount of actuarial gain (loss) not reflected in net periodic pension cost, net of tax. + References No definition available. + Details
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- Definition The amounts in accumulated other comprehensive income transition obligation that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented. + References No definition available. + Details
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- Definition Amount of actuarial gain (loss) not reflected in net periodic pension cost, net of tax. + References No definition available. + Details
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- Definition The amount of the transition obligation or asset recognized in net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(6) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation). + References No definition available. + Details
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- Definition Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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