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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2016
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Loss |
|  | Defined Benefit |  | Commodity |  |
|  | Pension and |  | Contracts |  |
|  | Postretirement |  | Cash Flow |  |
|  | Plan Items |  | Hedges |  | Total
(in thousands) |  |  |  |  |  |
As of December 31, 2015 |  | $ | (5,580 | ) |  | $ | (260 | ) |  | $ | (5,840 | )
Other comprehensive loss before reclassifications |  | — |  |  | (283 | ) |  | (283 | )
Amounts reclassified from accumulated other comprehensive loss |  | 89 |  |  | 283 |  |  | 372 |
Net current-period other comprehensive income |  | 89 |  |  | — |  |  | 89 |
As of March 31, 2016 |  | $ | (5,491 | ) |  | $ | (260 | ) |  | $ | (5,751 | )
|  | Defined Benefit |  | Commodity |  |
|  | Pension and |  | Contracts |  |
|  | Postretirement |  | Cash Flow |  |
|  | Plan Items |  | Hedges |  | Total
(in thousands) |  |  |  |  |  |
As of December 31, 2014 |  | $ | (5,643 | ) |  | $ | (33 | ) |  | $ | (5,676 | )
Other comprehensive loss before reclassifications |  | — |  |  | (7 | ) |  | (7 | )
Amounts reclassified from accumulated other comprehensive loss |  | 82 |  |  | 33 |  |  | 115 |
Net prior-period other comprehensive income |  | 82 |  |  | 26 |  |  | 108 |
As of March 31, 2015 |  | $ | (5,561 | ) |  | $ | (7 | ) |  | $ | (5,568 | )
Reclassifications out of Accumulated Other Comprehensive Income (Loss) |
|  | Three Months Ended
|  | March 31,
|  | 2016 |  | 2015
(in thousands) |  |  |  |
Amortization of defined benefit pension and postretirement plan items: |  |  |  |
Prior service cost (1) |  | $ | 20 |  |  | $ | 17 |
Net loss (1) |  | (168 | ) |  | (154 | )
Total before income taxes |  | (148 | ) |  | (137 | )
Income tax benefit |  | 59 |  |  | 55 |
Net of tax |  | $ | (89 | ) |  | $ | (82 | )
Gains and losses on commodity contracts cash flow hedges |  |  |  |
Propane swap agreements (2) |  | $ | (322 | ) |  | $ | — |
Call options (2) |  | — |  |  | (55 | )
Natural gas futures (2) |  | (149 | ) |  | — |
Total before income taxes |  | (471 | ) |  | (55 | )
Income tax benefit |  | 188 |  |  | 22 |
Net of tax |  | (283 | ) |  | (33 | )
Total reclassifications for the period |  | $ | (372 | ) |  | $ | (115 | )

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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