CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Mar. 31, 2012		Mar. 31, 2011
OPERATING REVENUES
Utility	$ 226,023		$ 433,248		$ 417,397		$ 723,924
Nonutility	386,898		543,739		837,935		966,215
Total operating revenues	612,921		976,987		1,255,332		1,690,139
OPERATING EXPENSES
Gas Purchases - Utility	78,301		235,001		163,931		395,450
Gas Purchases - Nonutility	382,055		548,618		788,472		977,865
Operation and maintenance	39,185		37,896		78,130		75,312
Regulatory rider expenses	18,443		24,304		30,986		41,002
Depreciation and amortization	10,439		8,477		20,039		16,931
Energy and other taxes	16,809		29,489		30,867		50,114
Total operating expenses	545,232		883,785		1,112,425		1,556,674
OPERATING INCOME	67,689		93,202		142,907		133,465
Other income	349		805		876		1,250
Interest expense, net of capitalized interest	5,427		5,078		10,432		10,341
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	62,611		88,929		133,351		124,374
Income tax provision	11,094		28,612		27,131		42,465
Equity in earnings of affiliates	3,018		3,610		5,672		6,527
NET INCOME	$ 54,535		$ 63,927		$ 111,892		$ 88,436
EARNINGS PER COMMON SHARE
BASIC	$ 1.31		$ 1.55		$ 2.70		$ 2.14
DILUTED	$ 1.31	[1]	$ 1.54	[1]	$ 2.68	[1]	$ 2.13	[1]
DIVIDENDS PER COMMON SHARE	$ 0.38		$ 0.36		$ 0.76		$ 0.72
WEIGHTED AVERAGE SHARES OUTSTANDING
BASIC	41,509		41,352		41,472		41,316
DILUTED	41,711		41,553		41,673		41,516

[1] There were no anti-dilutive shares excluded from the calculation of diluted earnings per share for the three and six months ended March 31, 2012 and 2011.