Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

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 June 30, 2016 and December 31, 2015:

			Fair Value Measurements Using:
As of June 30, 2016	Fair Value		Quoted- Prices- in Active Markets (Level 1)		Significant- Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
(in thousands)
Assets:
Investments—equity securities	$	21	$	21	$	—	$	—
Investments—guaranteed income fund	$	475	$	—	$	—	$	475
Investments—mutual funds and other	$	3,829	$	3,829	$	—	$	—
Mark-to-market energy assets, incl. put options and swap agreements	$	405	$	—	$	405	$	—
Liabilities:
Mark-to-market energy liabilities incl. swap agreements	$	256	$	—	$	256	$	—

			Fair Value Measurements Using:
As of December 31, 2015	Fair Value		Quoted- Prices- in Active Markets (Level 1)		Significant- Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
(in thousands)
Assets:
Investments—equity securities	$	18	$	18	$	—	$	—
Investments—guaranteed income fund	$	279	$	—	$	—	$	279
Investments—mutual funds and other	$	3,347	$	3,347	$	—	$	—
Mark-to-market energy assets, incl. put/call options	$	153	$	—	$	153	$	—
Liabilities:
Mark-to-market energy liabilities, incl. swap agreements	$	433	$	—	$	433	$	—

Summary of Changes in Fair Value of Investments

The following table sets forth the summary of the changes in the fair value of Level 3 investments for the six months ended June 30, 2016 and 2015:

	Six Months Ended   June 30,
	2016			2015
(in thousands)
Beginning Balance	$	279		$	287
Purchases and adjustments	112			49
Transfers	88			(3		)
Distribution	(8		)	—
Investment income	4			2
Ending Balance	$	475		$	335