Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2015

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, 2014	$	(5,643	)	$	(33	)	$	(5,676	)
Other comprehensive loss before reclassifications	—			(7		)	(7		)
Amounts reclassified from accumulated other comprehensive loss	82			33			115
Net current-period other comprehensive income (loss)	82			26			108
As of March 31, 2015	$	(5,561	)	$	(7	)	$	(5,568	)

	Defined Benefit			Commodity
	Pension and			Contracts
	Postretirement			Cash Flow
	Plan Items			Hedges		Total
(in thousands)
As of December 31, 2013	$	(2,533	)	$	—	$	(2,533	)
Other comprehensive loss before reclassifications	—			—		—
Amounts reclassified from accumulated other comprehensive loss	31			—		31
Net current-period other comprehensive income	31			—		31
As of March 31, 2014	$	(2,502	)	$	—	$	(2,502	)

Reclassifications out of Accumulated Other Comprehensive Income (Loss)

	Three Months Ended
	March 31,
	2015			2014
(in thousands)
Amortization of defined benefit pension and postretirement plan items:
Prior service cost (1)	$	17		$	14
Net loss (1)	(154		)	(66		)
Total before income taxes	(137		)	(52		)
Income tax benefit	55			21
Net of tax	$	(82	)	$	(31	)
Gains and losses on commodity contracts cash flow hedges
Propane swap agreements (2)	$	12		$	—
Call options (2)	(55		)	—
Total before income taxes	(43		)	—
Income tax benefit	17			—
Net of tax	(26		)	—
Total reclassifications for the period	$	(108	)	$	(31	)