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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
OPERATING REVENUES (NOTE 2) | $ 929,590 | $ 869,501 | $ 1,591,520 | $ 1,610,031
OPERATING EXPENSES |  |  |  |
Fuel and purchased power | 238,382 | 242,222 | 426,903 | 472,810
Operations and maintenance | 219,392 | 227,543 | 440,710 | 473,177
Depreciation and amortization | 152,482 | 147,374 | 306,561 | 296,081
Taxes other than income taxes | 56,768 | 55,090 | 113,536 | 110,180
Other expenses | 692 | 683 | 1,514 | 1,110
Total | 667,716 | 672,912 | 1,289,224 | 1,353,358
OPERATING INCOME | 261,874 | 196,589 | 302,296 | 256,673
OTHER INCOME (DEDUCTIONS) |  |  |  |
Allowance for equity funds used during construction | 8,811 | 7,572 | 16,508 | 18,760
Pension and other postretirement non-service credits - net | 14,142 | 6,374 | 28,053 | 11,488
Other income (Note 9) | 16,670 | 12,885 | 29,239 | 20,054
Other expense (Note 9) | (4,036) | (4,350) | (8,820) | (8,708)
Total | 35,587 | 22,481 | 64,980 | 41,594
INTEREST EXPENSE |  |  |  |
Interest charges | 62,690 | 57,465 | 121,924 | 118,118
Allowance for borrowed funds used during construction | (4,749) | (4,494) | (8,825) | (11,159)
Total | 57,941 | 52,971 | 113,099 | 106,959
INCOME BEFORE INCOME TAXES | 239,520 | 166,099 | 254,177 | 191,308
INCOME TAXES | 41,061 | 17,080 | 20,852 | 19,498
NET INCOME | 198,459 | 149,019 | 233,325 | 171,810
Less: Net income attributable to noncontrolling interests (Note 6) | 4,874 | 4,874 | 9,747 | 9,747
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | $ 193,585 | $ 144,145 | $ 223,578 | $ 162,063
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING |  |  |  |
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING - BASIC (in shares) | 112,638 | 112,337 | 112,616 | 112,381
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING - DILUTED (in shares) | 112,879 | 112,651 | 112,871 | 112,734
EARNINGS PER WEIGHTED-AVERAGE COMMON SHARE OUTSTANDING |  |  |  |
Net income attributable to common shareholders - basic (in dollars per share) | $ 1.72 | $ 1.28 | $ 1.99 | $ 1.44
Net income attributable to common shareholders - diluted (in dollars per share) | $ 1.71 | $ 1.28 | $ 1.98 | $ 1.44
APS |  |  |  |
OPERATING REVENUES (NOTE 2) | $ 929,590 | $ 869,501 | $ 1,591,520 | $ 1,610,031
OPERATING EXPENSES |  |  |  |
Fuel and purchased power | 238,382 | 242,222 | 426,903 | 472,810
Operations and maintenance | 216,221 | 224,143 | 434,486 | 464,518
Depreciation and amortization | 152,460 | 147,354 | 306,518 | 296,039
Taxes other than income taxes | 56,758 | 55,081 | 113,516 | 110,159
Other expenses | 692 | 683 | 1,514 | 1,110
Total | 664,513 | 669,483 | 1,282,937 | 1,344,636
OPERATING INCOME | 265,077 | 200,018 | 308,583 | 265,395
OTHER INCOME (DEDUCTIONS) |  |  |  |
Allowance for equity funds used during construction | 8,811 | 7,572 | 16,508 | 18,760
Pension and other postretirement non-service credits - net | 14,421 | 6,757 | 28,683 | 12,256
Other income (Note 9) | 13,272 | 11,691 | 24,905 | 18,107
Other expense (Note 9) | (3,859) | (3,428) | (8,527) | (7,306)
Total | 32,645 | 22,592 | 61,569 | 41,817
INTEREST EXPENSE |  |  |  |
Interest charges | 56,802 | 53,591 | 112,538 | 110,256
Allowance for borrowed funds used during construction | (4,749) | (4,494) | (8,825) | (11,159)
Total | 52,053 | 49,097 | 103,713 | 99,097
INCOME BEFORE INCOME TAXES | 245,669 | 173,513 | 266,439 | 208,115
INCOME TAXES | 43,677 | 18,463 | 24,229 | 19,916
NET INCOME | 201,992 | 155,050 | 242,210 | 188,199
Less: Net income attributable to noncontrolling interests (Note 6) | 4,874 | 4,874 | 9,747 | 9,747
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | $ 197,118 | $ 150,176 | $ 232,463 | $ 178,452

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