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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating Revenues |  |  |  |
Water |  | $ 295,258 | $ 306,332 | $ 302,931
Electric |  | 34,350 | 33,969 | 35,771
Contracted services |  | 107,208 | 100,302 | 97,385
Total operating revenues |  | 436,816 | 440,603 | 436,087
Operating Expenses |  |  |  |
Water purchased |  | 68,904 | 68,302 | 64,442
Power purchased for pumping |  | 8,971 | 8,518 | 8,663
Groundwater production assessment |  | 19,440 | 18,638 | 14,993
Power purchased for resale |  | 11,590 | 10,720 | 10,387
Supply cost balancing accounts |  | (15,649) | (17,939) | (12,206)
Other operation |  | 31,650 | 29,994 | 28,257
Administrative and general |  | 82,595 | 81,643 | 81,518
Depreciation and amortization | [1] | 40,425 | 39,031 | 38,850
Maintenance |  | 15,682 | 15,176 | 16,470
Property and other taxes |  | 18,404 | 17,905 | 16,801
ASUS construction |  | 53,906 | 49,838 | 53,720
Gain on sale of assets |  | (85) | (8,318) | 0
Total operating expenses |  | 335,833 | 313,508 | 321,895
Operating Income |  | 100,983 | 127,095 | 114,192
Other Income and Expenses |  |  |  |
Interest expense |  | (23,433) | (22,582) | (21,992)
Interest income |  | 3,578 | 1,790 | 757
Other, net |  | 760 | 2,038 | 1,521
Total other income and expenses |  | (19,095) | (18,754) | (19,714)
Income before income tax expense |  | 81,888 | 108,341 | 94,478
Income tax expense |  | 18,017 | 38,974 | 34,735
Net Income |  | $ 63,871 | $ 69,367 | $ 59,743
Basic Earnings Per Common Share |  |  |  |
Earnings Per Share, Basic |  | $ 1.73 | $ 1.88 | $ 1.63
Fully Diluted Earnings Per Share |  |  |  |
Earnings Per Share, Diluted |  | $ 1.72 | $ 1.88 | $ 1.62
Weighted Average Number of Shares Outstanding (in shares) |  | 36,733 | 36,638 | 36,552
Weighted Average Number of Diluted Shares (in shares) |  | 36,936 | 36,844 | 36,750
Dividends Declared Per Common Share (in dollars per share) |  | $ 1.06 | $ 0.994 | $ 0.914
GSWC |  |  |  |
Operating Revenues |  |  |  |
Water |  | $ 295,258 | $ 306,332 | $ 302,931
Electric |  | 34,350 | 33,969 | 35,771
Total operating revenues |  | 329,608 | 340,301 | 338,702
Operating Expenses |  |  |  |
Water purchased |  | 68,904 | 68,302 | 64,442
Power purchased for pumping |  | 8,971 | 8,518 | 8,663
Groundwater production assessment |  | 19,440 | 18,638 | 14,993
Power purchased for resale |  | 11,590 | 10,720 | 10,387
Supply cost balancing accounts |  | (15,649) | (17,939) | (12,206)
Other operation |  | 25,334 | 24,877 | 24,771
Administrative and general |  | 62,156 | 62,408 | 64,698
Depreciation and amortization |  | 38,395 | 37,852 | 37,804
Maintenance |  | 13,104 | 12,970 | 14,519
Property and other taxes |  | 16,809 | 16,402 | 15,444
Gain on sale of assets |  | (8) | (8,318) | 0
Total operating expenses |  | 249,046 | 234,430 | 243,515
Operating Income |  | 80,562 | 105,871 | 95,187
Other Income and Expenses |  |  |  |
Interest expense |  | (22,621) | (22,055) | (21,782)
Interest income |  | 2,890 | 1,766 | 749
Other, net |  | 784 | 2,234 | 1,424
Total other income and expenses |  | (18,947) | (18,055) | (19,609)
Income before income tax expense |  | 61,615 | 87,816 | 75,578
Income tax expense |  | 13,603 | 34,059 | 28,609
Net Income |  | $ 48,012 | $ 53,757 | $ 46,969
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