XML 27 R7.htm IDEA: XBRL DOCUMENT v3.8.0.1
STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating activities      
Net income $ 162,995 $ 140,095 $ 119,030
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 151,889 143,829 133,023
Deferred income taxes 92,393 86,788 63,789
Share-based compensation expense 8,876 11,219 9,187
Provision for doubtful accounts 7,323 5,427 4,520
Changes in assets and liabilities:      
Accounts receivable (15,147) (80,028) 105,886
Materials and supplies (5,588) (759) (5,814)
Income tax receivable 0 37,480 4,923
Natural gas in storage (4,722) 16,721 43,147
Asset removal costs (52,376) (53,430) (51,608)
Accounts payable 1,945 27,596 (59,635)
Accrued interest (78) (19) 1
Accrued taxes other than income (1,247) 5,322 (7,493)
Accrued liabilities 7,127 (8,539) 5,451
Customer deposits (398) 884 322
Regulatory assets and liabilities 29,250 (49,472) 50,658
Employee benefit obligation (118,095) (25,666) (15,033)
Other assets and liabilities (10,347) 33,141 7,562
Cash provided by operating activities 253,800 290,589 407,916
Investing activities      
Capital expenditures (356,361) (309,071) (294,320)
Other 618 492 0
Cash used in investing activities (355,743) (308,579) (294,320)
Financing activities      
Borrowings (repayment) on notes payable, net 212,215 132,500 (29,500)
Repurchase of common stock (17,512) (24,066) (24,122)
Issuance of common stock 4,457 4,017 7,051
Dividends paid (87,951) (73,209) (62,826)
Tax withholdings related to net share settlements of stock compensation (9,516) (9,022) (13,709)
Cash provided by (used in) financing activities 101,693 30,220 (123,106)
Change in cash and cash equivalents (250) 12,230 (9,510)
Cash and cash equivalents at beginning of period 14,663 2,433 11,943
Cash and cash equivalents at end of period 14,413 14,663 2,433
Supplemental cash flow information:      
Cash paid for interest, net of amounts capitalized 44,436 42,129 42,980
Cash received for income taxes, net $ (1,389) $ (35,702) $ (5,423)