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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
OPERATING REVENUES |  |  |  |
Utility | $ 295,546 | $ 242,536 | $ 481,102 | $ 394,142
Nonutility | 438,000 | 331,657 | 793,472 | 624,309
Total operating revenues | 733,546 | 574,193 | 1,274,574 | 1,018,451
OPERATING EXPENSES |  |  |  |
Gas Purchases - Utility | 112,445 | 82,374 | 173,765 | 129,039
Gas Purchases - Nonutility | 367,328 | 287,883 | 705,260 | 541,971
Gas Purchases - Related parties | 2,072 | 2,077 | 4,183 | 4,151
Operation and maintenance | 52,342 | 53,125 | 104,570 | 99,358
Regulatory rider expenses | 19,893 | 21,215 | 32,494 | 30,843
Depreciation and amortization | 20,328 | 17,744 | 39,588 | 34,226
Energy and other taxes | 19,485 | 15,842 | 33,586 | 25,479
Total operating expenses | 593,893 | 480,260 | 1,093,446 | 865,067
OPERATING INCOME | 139,653 | 93,933 | 181,128 | 153,384
Other income, net | 5,338 | 2,202 | 9,114 | 4,126
Interest expense, net of capitalized interest | 11,436 | 7,369 | 22,051 | 14,146
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 133,555 | 88,766 | 168,191 | 143,364
Income tax provision | 23,932 | 17,815 | 25,950 | 24,537
Equity in earnings of affiliates | 5,079 | 2,402 | 7,390 | 4,808
NET INCOME | $ 114,702 | $ 73,353 | $ 149,631 | $ 123,635
EARNINGS PER COMMON SHARE |  |  |  |
Basic (usd per share) | $ 1.33 | $ 0.85 | $ 1.74 | $ 1.44
Diluted (usd per share) | 1.32 | 0.84 | 1.72 | 1.42
DIVIDENDS DECLARED PER COMMON SHARE (usd per share) | $ 0.255 | $ 0.24 | $ 0.51 | $ 0.48
WEIGHTED AVERAGE SHARES OUTSTANDING |  |  |  |
Basic (in shares) | 86,275 | 85,834 | 86,182 | 85,754
Diluted (in shares) | 87,101 | 86,858 | 86,993 | 86,778

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- Definition Total costs incurred and are directly related to energy commodities and services provided during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d),(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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