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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating activities |  |  |
Net income | $ 1,155,032 | $ 593,519 | $ 743,499
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 428,557 | 406,335 | 391,585
Impairment charges | 0 | 20,240 | 0
Noncash contribution of preferred stock, net of tax | 0 | 12,600 | 0
Equity in net earnings from investments | (158,383) | (159,278) | (139,690)
Distributions received from unconsolidated affiliates | 170,528 | 167,372 | 144,673
Deferred income taxes | 361,010 | 437,917 | 211,638
Share-based compensation expense | 31,664 | 26,262 | 40,563
Pension and postretirement benefit expense, net of contributions | 469 | 4,079 | 11,643
Allowance for equity funds used during construction | (7,962) | (107) | (209)
Gain on sale of assets | (601) | (924) | (9,635)
Changes in assets and liabilities: |  |  |
Accounts receivable | 383,993 | (330,521) | (285,806)
Natural gas and natural gas liquids in storage | 38,456 | (202,259) | (11,950)
Accounts payable | (320,132) | 261,305 | 287,632
Commodity imbalances, net | (44,302) | 43,699 | 45,971
Accrued interest | 26,068 | 22,795 | (16,529)
Risk-management assets and liabilities | 117,717 | 37,617 | (78,136)
Other assets and liabilities, net | 4,605 | (25,239) | 17,971
Cash provided by operating activities | 2,186,719 | 1,315,412 | 1,353,220
Investing activities |  |  |
Capital expenditures (less allowance for equity funds used during construction) | (2,141,475) | (512,393) | (624,634)
Contributions to unconsolidated affiliates | (1,748) | (87,861) | (68,275)
Distributions received from unconsolidated affiliates in excess of cumulative earnings | 26,757 | 28,742 | 52,044
Proceeds from sale of assets | 1,578 | 3,879 | 25,420
Cash used in investing activities | (2,114,888) | (567,633) | (615,445)
Financing activities |  |  |
Dividends paid | (1,335,058) | (829,414) | (517,601)
Distributions to noncontrolling interests | (3,500) | (276,260) | (549,419)
Borrowing (repayment) of short-term borrowings, net | (614,673) | (495,604) | 563,937
Issuance of long-term debt, net of discounts | 1,795,773 | 1,190,496 | 1,000,000
Debt financing costs | (13,441) | (11,425) | (2,770)
Repayment of long-term debt | (932,650) | (994,776) | (1,108,040)
Issuance of common stock | 1,203,981 | 471,358 | 21,971
Acquisition of noncontrolling interests | (195,000) | 0 | 0
Other, net | (2,481) | (13,836) | 5,403
Cash used in financing activities | (97,049) | (959,461) | (586,519)
Change in cash and cash equivalents | (25,218) | (211,682) | 151,256
Cash and cash equivalents at beginning of period | 37,193 | 248,875 | 97,619
Cash and cash equivalents at end of period | 11,975 | 37,193 | 248,875
Supplemental cash flow information: |  |  |
Cash paid for interest, net of amounts capitalized | 418,244 | 432,210 | 461,208
Cash paid for income taxes | $ 2,225 | $ 6,633 | $ 361

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- Definition Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21D -URI http://asc.fasb.org/extlink&oid=98514028&loc=SL94080555-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition The net cash inflow or outflow for borrowing having initial term of repayment within one year or 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 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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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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