Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

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 December 31, 2012:

			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—equity securities	$	2,007	$	2,007	$	—	$	—
Investments—other	$	2,161	$	2,161	$	—	$	—
Mark-to-market energy assets, including put option	$	210	$	—	$	210	$	—
Liabilities:
Mark-to-market energy liabilities	$	331	$	—	$	331	$	—

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 December 31, 2011:

			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—equity securities	$	2,224	$	2,224	$	—	$	—
Investments—other (1)	$	1,734	$	1,734	$	—	$	—
Mark-to-market energy assets, including put option	$	1,754	$	—	$	1,754	$	—
Liabilities:
Mark-to-market energy liabilities	$	1,496	$	—	$	1,496	$	—

⁽¹⁾  The current portion of this investment ($40) is included in other current assets in the accompanying consolidated balance sheets.