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QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Data [Abstract] |
Quarterly Financial Data |
Year Ended December 31, 2018 |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
|  | (Thousands of dollars, except per share amounts)
Total revenues |  | $ | 3,102,077 |  |  | $ | 2,960,529 |  |  | $ | 3,393,890 |  |  | $ | 3,136,700 |
Net income |  | $ | 266,049 |  |  | $ | 282,179 |  |  | $ | 313,916 |  |  | $ | 292,888 |
Net income attributable to ONEOK |  | $ | 264,508 |  |  | $ | 281,048 |  |  | $ | 313,259 |  |  | $ | 292,888 |
Net income attributable to common shareholders |  | $ | 264,233 |  |  | $ | 280,773 |  |  | $ | 312,984 |  |  | $ | 292,613 |
Earnings per share total |  |  |  |  |  |  |  |
Basic |  | $ | 0.65 |  |  | $ | 0.68 |  |  | $ | 0.76 |  |  | $ | 0.71 |
Diluted |  | $ | 0.64 |  |  | $ | 0.68 |  |  | $ | 0.75 |  |  | $ | 0.70 |
In the third quarter 2018, we acquired the remaining 20 percent interest in WTLPG for $195 million with cash on hand. We are now the sole owner of the West Texas LPG pipeline system.
Year Ended December 31, 2017 |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
|  | (Thousands of dollars except per share amounts)
Total revenues |  | $ | 2,749,611 |  |  | $ | 2,725,772 |  |  | $ | 2,906,366 |  |  | $ | 3,792,158 |
Net income |  | $ | 186,185 |  |  | $ | 175,991 |  |  | $ | 166,531 |  |  | $ | 64,812 |
Net income attributable to ONEOK |  | $ | 87,361 |  |  | $ | 71,693 |  |  | $ | 165,742 |  |  | $ | 63,045 |
Net income attributable to common shareholders |  | $ | 87,361 |  |  | $ | 71,476 |  |  | $ | 165,466 |  |  | $ | 62,771 |
Earnings per share total |  |  |  |  |  |  |  |
Basic |  | $ | 0.41 |  |  | $ | 0.34 |  |  | $ | 0.43 |  |  | $ | 0.16 |
Diluted |  | $ | 0.41 |  |  | $ | 0.33 |  |  | $ | 0.43 |  |  | $ | 0.16 |
The fourth quarter 2017 includes a one-time noncash charge of $141.3 million related to revaluation of our deferred tax balances and a valuation allowance on certain state net operating loss and tax credit carryforwards resulting from the enactment of the Tax Cuts and Jobs Act, as described in Note L. The third quarter 2017 includes noncash impairment charges of $20.2 million related to Natural Gas Gathering and Processing assets and equity investments. The second quarter 2017 includes a $20.0 million noncash expense related to our Series E Preferred Stock contribution to the Foundation and operating costs related to the Merger Transaction of $30.0 million.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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