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STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Document Fiscal Year Focus 2018  
Operating activities    
Net income $ 127,530 $ 115,876
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 118,991 113,293
Deferred income taxes 36,637 61,329
Share-based compensation expense 6,195 6,930
Provision for doubtful accounts 6,758 4,508
Changes in assets and liabilities:    
Accounts receivable 159,574 158,747
Materials and supplies (691) (4,705)
Natural gas in storage 3,673 (32,209)
Asset removal costs (39,195) (37,928)
Accounts payable (63,857) (65,983)
Accrued interest (10,909) (11,112)
Accrued taxes other than income 7,436 2,087
Accrued liabilities (6,090) (4,396)
Customer deposits 758 (1,566)
Regulatory assets and liabilities 100,268 11,448
Other assets and liabilities (10,310) (13,915)
Cash provided by operating activities 436,768 302,404
Investing activities    
Capital expenditures (279,346) (249,057)
Other 0 617
Cash used in investing activities (279,346) (248,440)
Financing activities    
Repayments of notes payable, net (81,215) 29,000
Repurchase of common stock 0 (17,512)
Issuance of common stock 2,390 2,208
Dividends paid (72,432) (65,996)
Tax withholdings related to net share settlements of stock compensation (8,148) (9,455)
Cash used in financing activities (159,405) (61,755)
Change in cash and cash equivalents (1,983) (7,791)
Cash and cash equivalents at beginning of period 14,413 14,663
Cash and cash equivalents at end of period $ 12,430 $ 6,872