Income taxes (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2016 |
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| Income taxes | |||||
| Income tax expense | $ 167 | $ 95 | $ 507 | $ 457 | |
| Effective tax rate (as a percent) | 5.40% | 1.80% | 2.90% | 2.10% | |
| Uncertain tax positions | $ 389 | $ 389 | $ 380 | ||
| Uncertain tax positions, reduction to deferred tax assets | 84 | 84 | 84 | ||
| Accrued interest, net of federal income tax benefits, and penalties | 76 | 76 | $ 67 | ||
| Unrecognized tax benefits that, if recognized, would affect the effective tax rate | $ 229 | $ 229 | |||
| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the amount of uncertain tax positions, which is a reduction to deferred tax assets that is presented as net of uncertain tax positions in the accompanying consolidated balance sheets. No definition available.
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