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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Operating activities |  |
Net income | $ 548,228 | $ 362,176
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 210,525 | 200,268
Noncash contribution of preferred stock, net of tax | 0 | 12,600
Equity in net earnings from investments | (76,757) | (78,927)
Distributions received from unconsolidated affiliates | 84,652 | 81,744
Deferred Income Tax Expense (Benefit) | 161,602 | 90,685
Share-based compensation expense | 16,071 | 13,477
Pension and postretirement benefit expense, net of contributions | (5,096) | (1,576)
Allowance for equity funds used during construction | (1,034) | (35)
Gain on sale of assets | (185) | (630)
Changes in assets and liabilities: |  |
Accounts receivable | 268,287 | 123,085
Natural gas and natural gas liquids in storage | 49,347 | (60,099)
Accounts payable | (282,572) | (134,334)
Commodity imbalances, net | (15,873) | (6,134)
Risk-management assets and liabilities | 72,580 | 66,940
Other assets and liabilities, net | (26,805) | (26,349)
Cash provided by operating activities | 1,002,970 | 642,891
Investing activities |  |
Capital expenditures (less allowance for equity funds used during construction) | (615,352) | (195,232)
Contributions to unconsolidated affiliates | (294) | (4,653)
Distributions received from unconsolidated affiliates in excess of cumulative earnings | 13,588 | 14,936
Proceeds from sale of assets | 657 | 1,218
Cash used in investing activities | (601,401) | (183,731)
Financing activities |  |
Dividends paid | (643,493) | (259,758)
Distributions to noncontrolling interests | (3,000) | (273,460)
Borrowing (repayment) of short-term borrowings, net | (458,673) | 164,130
Repayment of long-term debt | (503,825) | (3,898)
Issuance of common stock | 1,186,718 | 10,845
Other, net | (1,194) | (13,523)
Cash used in financing activities | (423,467) | (375,664)
Change in cash and cash equivalents | (21,898) | 83,496
Cash and cash equivalents at beginning of period | 37,193 | 248,875
Cash and cash equivalents at end of period | $ 15,295 | $ 332,371

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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 + Details
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- Definition The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501569&loc=d3e55921-110430 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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