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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash Flows From Operating Activities:      
Net Income $ 69,367 $ 59,743 $ 60,484
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 39,273 39,109 42,674
Provision for doubtful accounts 989 619 870
Deferred income taxes and investment tax credits 12,153 27,640 10,423
Stock-based compensation expense 2,885 2,538 2,754
Gain (Loss) on Sale of Assets and Asset Impairment Charges (8,318) 0 0
Other - net (1,525) (397) 838
Changes in assets and liabilities:      
Accounts receivable - customers (7,671) (1,750) (923)
Unbilled revenue (2,020) (4,901) 1,932
Other accounts receivable (1,671) (1,233) 1,243
Increase (Decrease) Receivable from Government (4,742) 2,606 (848)
Materials and supplies (501) 1,121 (1,827)
Prepayments and other current assets (1,641) 2,239 1,580
Increase (Decrease) in Costs in Excess of Billings on Uncompleted Contracts or Programs 2,881 10,433 3,223
Increase (Decrease) in Regulatory Assets and Liabilities 24,626 (5,610) (26,422)
Accounts payable 4,358 (3,442) 679
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits (878) (289) 616
Increase (Decrease) in Income Taxes Payable 13,206 (6,993) 9,630
Increase (Decrease) in Billing in Excess of Cost of Earnings 1,648 (1,501) (7,972)
Other liabilities (1,589) 3,095 941
Net Cash Provided 144,552 96,949 95,145
Cash Flows From Investing Activities:      
Capital expenditures (113,126) (129,867) (87,323)
Proceeds from Sale of Property, Plant, and Equipment 34,324 0 54
Net Cash Provided by (Used in) Investing Activities, Continuing Operations (80,031) (131,221) (90,138)
Payments to Acquire Investments (1,229) (1,354) (2,869)
Proceeds from Issuance of Common Shares and Stock Option Exercises 909 235 1,198
Cash Flows From Financing Activities:      
Payments for Repurchase of Common Stock 0 0 (72,893)
Tax benefits from exercise of stock-based awards 0 581 877
Receipt of advances for and contributions in aid of construction 7,275 6,660 3,731
Refunds on advances for construction (3,889) (3,921) (3,660)
Retirement or repayments of long-term debt (329) (313) (237)
Net change in notes payable to banks (31,000) 62,000 28,000
Dividends paid (36,417) (33,408) (32,690)
Other (1,292) (1,490) (957)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations (64,743) 30,344 (76,631)
Net increase (decrease) in cash and cash equivalents (222) (3,928) (71,624)
Cash and cash equivalents, beginning of year 436 4,364 75,988
Cash and cash equivalents, end of year 214 436 4,364
Proceeds from Sale of Property, Plant, and Equipment 34,324 0 54
GSWC      
Cash Flows From Operating Activities:      
Net Income 53,757 46,969 47,591
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 38,094 38,063 41,534
Provision for doubtful accounts 816 627 845
Deferred income taxes and investment tax credits 13,970 28,099 10,719
Stock-based compensation expense 2,420 2,118 2,443
Gain (Loss) on Sale of Assets and Asset Impairment Charges (8,318) 0 0
Other - net (1,613) (352) 822
Changes in assets and liabilities:      
Accounts receivable - customers (7,671) (1,750) (923)
Unbilled revenue (1,152) 481 (448)
Other accounts receivable (544) (896) 1,067
Materials and supplies (322) 1,136 (2,069)
Prepayments and other current assets (1,450) 2,114 440
Increase (Decrease) in Regulatory Assets and Liabilities 24,626 (5,610) (26,422)
Accounts payable 4,927 (1,514) 1,940
Increase (Decrease) in Related Party Receivable Payable, Current (390) 280 445
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits (878) (289) 616
Increase (Decrease) in Income Taxes Payable 15,266 (10,856) 18,580
Other liabilities (1,930) 2,666 358
Net Cash Provided 129,608 101,286 97,538
Cash Flows From Investing Activities:      
Capital expenditures (110,487) (127,913) (86,144)
Origination of Notes Receivable from Related Parties 0 0 (20,700)
Repayment of Notes Receivable from Related Parties 0 0 20,700
Payments for (Proceeds from) Other Investing Activities (1,229) (1,389) (2,869)
Proceeds from Sale of Property, Plant, and Equipment 34,324 0 0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations (77,392) (129,302) (89,013)
Cash Flows From Financing Activities:      
Tax benefits from exercise of stock-based awards 0 501 872
Receipt of advances for and contributions in aid of construction 7,275 6,660 3,731
Refunds on advances for construction (3,889) (3,921) (3,660)
Retirement or repayments of long-term debt (329) (313) (237)
Net change in inter-company borrowings (26,500) 49,500 12,000
Dividends paid (27,680) (25,450) (62,000)
Other (1,088) (1,253) (735)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations (52,211) 25,724 (50,029)
Net increase (decrease) in cash and cash equivalents 5 (2,292) (41,504)
Cash and cash equivalents, beginning of year 209 2,501 44,005
Cash and cash equivalents, end of year 214 209 2,501
Proceeds from Sale of Property, Plant, and Equipment $ 34,324 $ 0 $ 0