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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Income Statement [Abstract] |  |  |  |
OPERATING REVENUE | $ 112,344 | $ 82,955 | $ 260,400 | $ 217,469
Production Expenses: |  |  |  |
Purchased water | 28,681 | 22,085 | 52,863 | 47,371
Power | 2,141 | 2,500 | 4,992 | 5,200
Groundwater extraction charges | 10,867 | 7,920 | 25,627 | 22,053
Other production expenses | 3,311 | 3,033 | 9,815 | 9,095
Total production expenses | 45,000 | 35,538 | 93,297 | 83,719
Administrative and general | 12,449 | 12,101 | 35,690 | 34,861
Maintenance | 4,217 | 3,975 | 12,082 | 11,187
Property taxes and other non-income taxes | 3,213 | 2,893 | 9,115 | 8,878
Depreciation and amortization | 11,119 | 10,188 | 33,489 | 30,549
Total operating expense | 75,998 | 64,695 | 183,673 | 169,194
OPERATING INCOME | 36,346 | 18,260 | 76,727 | 48,275
OTHER (EXPENSE) INCOME: |  |  |  |
Interest on long-term debt | (4,993) | (5,200) | (15,039) | (15,838)
Mortgage and other interest expense | (433) | (316) | (1,291) | (948)
Gain on sale of California Water Service Group stock | 0 | 0 | 3,197 | 0
Gain on sale of real estate investments | 124 | 1,886 | 124 | 1,886
Dividend income | 17 | 43 | 70 | 130
Other, net | 410 | 398 | 869 | 921
Income before income taxes | 31,471 | 15,071 | 64,657 | 34,426
Provision for income taxes | 12,512 | 5,537 | 25,545 | 12,736
NET INCOME | 18,959 | 9,534 | 39,112 | 21,690
Other comprehensive income (loss), net of tax: |  |  |  |
Unrealized (loss) gain on investment | (169) | (112) | 848 | (382)
Reclassification adjustment for gain realized on sale of investments | 0 | 0 | (1,742) | 0
COMPREHENSIVE INCOME | $ 18,790 | $ 9,422 | $ 38,218 | $ 21,308
EARNINGS PER SHARE |  |  |  |
Basic (usd per share) | $ 0.93 | $ 0.47 | $ 1.91 | $ 1.07
Diluted (usd per share) | 0.92 | 0.46 | 1.90 | 1.06
DIVIDENDS PER SHARE (usd per share) | $ 0.20 | $ 0.20 | $ 0.61 | $ 0.59
WEIGHTED AVERAGE SHARES OUTSTANDING |  |  |  |
Basic (shares) | 20,451,930 | 20,375,960 | 20,434,494 | 20,353,487
Diluted (shares) | 20,602,410 | 20,531,855 | 20,580,728 | 20,504,701

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- Definition Cost of water purchased, may include any water related assessment. If water is bought on a unit volume basis, would also be considered as commodity costs. + 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) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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