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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash Flows From Operating Activities: |  |  |
Net Income | $ 86,425 | $ 84,342 | $ 63,871
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 37,204 | 35,713 | 40,663
Provision for doubtful accounts | 1,433 | 608 | 841
Deferred income taxes and investment tax credits | 2,243 | 6,623 | (5,773)
Stock-based compensation expense | 2,463 | 2,517 | 3,851
(Gain) loss on sale of assets | 31 | (253) | (85)
(Gain) loss on investments held in a trust | (3,024) | (3,580) | 558
Other - net | (908) | 526 | 97
Changes in assets and liabilities: |  |  |
Accounts receivable - customers | (13,272) | 1,882 | 1,882
Unbilled revenue- receivable | 6,678 | 5,515 | (2,823)
Other accounts receivable | (1,204) | 214 | 5,151
Receivable from the U.S. government | 3,889 | (1,144) | 20,976
Materials and supplies | (2,190) | (654) | (980)
Prepayments and other assets | 1,686 | 3,978 | (519)
Contract Assets | (588) | 3,979 | 5,941
Regulatory Assets / Liabilities | 10,150 | (11,597) | 33,834
Accounts payable | 5,348 | (249) | 1,282
Income taxes receivable / payable | 12,270 | (3,786) | 2,708
Contract liabilities | (9,367) | 3,637 | 3,619
Accrued pension and other post-retirement benefits | 1,444 | 1,994 | (1,086)
Other liabilities | 2,593 | (4,659) | (928)
Cash Flows From Operating Activities | 122,170 | 116,864 | 136,774
Cash Flows From Investing Activities: |  |  |
Capital expenditures | (130,423) | (151,940) | (126,561)
Proceeds from sale of assets | 88 | 169 | 72
Other investments | 1,275 | 1,424 | 1,553
Net Cash Provided by (Used in) Investing Activities | (131,610) | (153,195) | (128,042)
Cash Flows From Financing Activities: |  |  |
Proceeds from stock option exercises | 30 | 519 | 546
Proceeds from Advances for Construction | 9,338 | 10,171 | 5,551
Refunds on advances for construction | 3,729 | 5,005 | 3,886
Retirement or repayments of long-term debt | (336) | (40,325) | (326)
Increase (Decrease) in Notes Payable, Current | (70,800) | 109,500 | 36,500
Proceeds from issuance of long-term debt, net of issuance costs | 159,413 | 0 | 0
Dividends paid | (47,206) | (42,702) | (38,937)
Other | (1,867) | (1,634) | (1,253)
Net Cash Provided by (Used in) Financing Activities | 44,843 | 30,524 | (1,805)
Net change in cash and cash equivalents | 35,403 | (5,807) | 6,927
Cash and cash equivalents, beginning of period | 1,334 | 7,141 | 214
Cash and cash equivalents, end of year | 36,737 | 1,334 | 7,141
GSWC |  |  |
Cash Flows From Operating Activities: |  |  |
Net Income | 64,971 | 66,663 | 48,012
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 32,477 | 32,757 | 38,633
Provision for doubtful accounts | 1,018 | 606 | 850
Deferred income taxes and investment tax credits | 1,181 | 5,081 | (6,817)
Stock-based compensation expense | 2,349 | 2,253 | 3,397
(Gain) loss on sale of assets | 0 | (88) | (8)
(Gain) loss on investments held in a trust | (3,024) | (3,580) | 558
Other - net | (576) | 58 | 27
Changes in assets and liabilities: |  |  |
Accounts receivable - customers | (12,126) | 1,882 | 1,882
Unbilled revenue- receivable | 1,693 | 744 | (960)
Other accounts receivable | (1,364) | 311 | 4,140
Materials and supplies | (2,166) | (123) | (751)
Prepayments and other assets | 1,124 | 4,230 | (154)
Regulatory Assets / Liabilities | 13,278 | (11,597) | 33,834
Accounts payable | 1,810 | 1,558 | (1,907)
Inter-company receivable / payable | (1,911) | 1,056 | (47)
Income taxes receivable / payable | 12,339 | (2,110) | 973
Accrued pension and other post-retirement benefits | 1,390 | 1,994 | (1,086)
Other liabilities | 1,260 | (3,579) | (2,057)
Cash Flows From Operating Activities | 110,337 | 96,628 | 120,439
Cash Flows From Investing Activities: |  |  |
Capital expenditures | (116,409) | (142,852) | (116,354)
Note receivable from AWR parent | (6,000) | 0 | 0
Receipt of payment of note receivable from AWR parent | 6,000 | 0 | 0
Proceeds from sale of assets | 0 | 88 | 9
Other investments | 1,275 | 1,424 | 1,553
Net Cash Provided by (Used in) Investing Activities | (117,684) | (144,188) | (117,898)
Cash Flows From Financing Activities: |  |  |
Proceeds from issuance of Common Shares to Parent | 60,000 | 0 | 47,500
Proceeds from Advances for Construction | 9,338 | 10,171 | 5,551
Refunds on advances for construction | 3,729 | 5,005 | 3,886
Retirement or repayments of long-term debt | (336) | (40,325) | (326)
Proceeds from issuance of long-term debt, net of issuance costs | 159,413 | 0 | 0
Net change in inter-company borrowings | 158,000 | (100,500) | (22,500)
Dividends paid | (22,500) | (20,200) | (68,850)
Other | (1,662) | (1,367) | (1,057)
Net Cash Provided by (Used in) Financing Activities | 42,524 | 43,774 | 1,432
Net change in cash and cash equivalents | 35,177 | (3,786) | 3,973
Cash and cash equivalents, beginning of period | 401 | 4,187 | 214
Cash and cash equivalents, end of year | $ 35,578 | $ 401 | $ 4,187

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