Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Inventories

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

	December 31,
	2014		2013
Materials and supplies	$	30,672	$	28,263
Storage gas and fuel	24,422		27,346
	$	55,094	$	55,609

Other Noncurrent Liabilties

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

	December 31,
	2014		2013
Pension and other employee benefits	$	137,377	$	57,140
Future QF obligation, net	136,893		136,448
Environmental	28,060		28,194
Customer advances	30,001		27,371
Other	50,158		43,471
	$	382,489	$	292,624

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Year Ended December 31,
	2014		2013		2012
			(in thousands)
Cash paid for:
Income taxes	$	35	$	50	$	2,944
Interest	63,482		57,789		51,271
Significant non-cash transactions:
Capital expenditures included in trade accounts payable	8,555		12,025		13,136