Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

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Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes our financial assets and liabilities that are measured at fair value on a recurring basis and the fair value measurements, by level, within the fair value hierarchy as of December 31, 2014:

			Fair Value Measurements Using:
(in thousands)	Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Investments—guaranteed income fund	$	287	$	—	$	—	$	287
Investments—other	$	3,391	$	3,391	$	—	$	—
Mark-to-market energy assets, incl. put/call options	$	1,055	$	—	$	1,055	$	—
Liabilities:
Mark-to-market energy liabilities, incl. swap agreements	$	1,018	$	—	$	1,018	$	—

The following table summarizes our financial assets and liabilities that are measured at fair value on a recurring basis and the fair value measurements, by level, within the fair value hierarchy as of December 31, 2013:

			Fair Value Measurements Using:
(in thousands)	Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Investments—guaranteed income fund	$	458	$	—	$	—	$	458
Investments—other	$	2,640	$	2,640	$	—	$	—
Mark-to-market energy assets, including put option	$	385	$	—	$	385	$	—
Liabilities:
Mark-to-market energy liabilities	$	127	$	—	$	127	$	—

Schedule of Changes in Fair Value of Plan Assets

The following table sets forth the summary of the changes in the fair value of Level 3 investments for the years ended December 31, 2014 and 2013:

	For the Year Ended December 31,
	2014			2013
(in thousands)
Beginning Balance	$	458		$	—
Transfers in due to change in trustee	—			425
Purchases and adjustments	76			41
Transfers	(253		)	(16		)
Investment income	6			8
Ending Balance	$	287		$	458