Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

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 used at June 30, 2013 and December 31, 2012:

			Fair Value Measurements Using:
June 30, 2013	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	$	1,024	$	1,024	$	—	$	—
Investments—guaranteed income fund	$	509	$	—	$	—	$	509
Investments—other	$	3,384	$	3,384	$	—	$	—
Mark-to-market energy assets, including put/call options	$	248	$	—	$	248	$	—
Liabilities:
Mark-to-market energy liabilities	$	74	$	—	$	74	$	—

			Fair Value Measurements Using:
December 31, 2012 (in thousands)	Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Investments—equity securities	$	2,007	$	2,007	$	—	$	—
Investments—other	$	2,161	$	2,161	$	—	$	—
Mark-to-market energy assets, including call options	$	210	$	—	$	210	$	—
Liabilities:
Mark-to-market energy liabilities	$	331	$	—	$	331	$	—

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, 2013:

At June 30,	2013
(in thousands)
Beginning Balance	$	—
Transfers in due to change in trustee	425
Purchases and adjustments	96
Transfers	(16		)
Investment Income	4
Ending Balance	$	509