Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Inventories

Inventories are stated at average cost. Inventory consisted of the following (in thousands):

	December 31,
	2012		2011
Materials and supplies	$	25,094	$	22,316
Storage gas and fuel	29,067		37,216
	$	54,161	$	59,532

Other Noncurrent Liabilties

Other noncurrent liabilities consisted of the following (in thousands):

	December 31,
	2012		2011
Pension and other employee benefits	$	148,384	$	113,371
Future QF obligation, net	136,652		184,187
Environmental	30,189		30,127
Customer advances	34,681		41,020
Other	25,148		20,307
	$	375,054	$	389,012

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Year Ended December 31,
	2012		2011			2010
			(in thousands)
Cash paid (received) for:
Income taxes	$	2,944	$	(1,219	)	$	2,000
Interest	51,271		52,328			42,589
Significant non-cash transactions:
Capital expenditures included in trade accounts payable	13,136		10,910			7,264