Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31, 2013 and December 31, 2012:

			Fair Value Measurements Using:
March 31, 2013 (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	$	1,742	$	1,742	$	—	$	—
Investments—guaranteed income fund	$	398	$	—	$	—	$	398
Investments—other	$	2,386	$	2,386	$	—	$	—
Mark-to-market energy assets	$	150	$	—	$	150	$	—
Liabilities:
Mark-to-market energy liabilities	$	85	$	—	$	85	$	—

			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 three months ended March 31, 2013:

At March 31,	2013
(in thousands)
Beginning Balance	$	—
Transfers in due to change in trustee		425
Purchases and adjustments		(13	)
Transfers		(16	)
Investment Income		2
Ending Balance	$	398