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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities |  |  |
Net income | $ 248,056 | $ 199,714 | $ 219,772
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation of property, plant and equipment | 246,158 | 238,114 | 229,858
Other amortization | 32,544 | 52,664 | 48,255
Provision for credit losses | (25,825) | 50,811 | 23,480
Loans originated, held for sale | (340,986) | (564,525) | (285,042)
Proceeds from sale of loans, held for sale | 364,848 | 567,652 | 277,119
Gain on sale of real estate, held for sale | 0 | 0 | (10,762)
Gain on sale of investment securities, net | (528) | (9,275) | (653)
Gain on sale of loans | (9,305) | (23,734) | (4,943)
Deferred income taxes | (5,398) | (1,706) | (15,085)
Share-based compensation expense | 9,135 | 5,810 | 9,986
Allowance for equity funds used during construction | (9,534) | (8,768) | (11,987)
Other | (7,060) | 1,366 | 18,568
Changes in assets and liabilities |  |  |
Decrease (increase) in accounts receivable and unbilled revenues, net | (73,811) | 2,533 | 23,933
Decrease (increase) in fuel oil stock | (45,819) | 34,202 | (11,493)
Decrease (increase) in regulatory assets | (13,874) | 1,007 | 71,262
Increase (decrease) in regulatory liabilities | 15,358 | (16,562) | 1,953
Increase (decrease) in accounts, interest and dividends payable | 9,925 | (20,068) | (3,054)
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes | 41,331 | (35,610) | (27,538)
Decrease in defined benefit pension and other postretirement benefit plans liability | (6,660) | (2,029) | (4,482)
Change in other assets and liabilities | (52,882) | (42,189) | (36,677)
Net cash provided by operating activities | 375,673 | 429,407 | 512,470
Cash flows from investing activities |  |  |
Available-for-sale investment securities purchased | (1,464,644) | (1,361,594) | (108,088)
Principal repayments on available-for-sale investment securities | 583,238 | 478,351 | 272,949
Proceeds from sale of available-for-sale investment securities | 197,354 | 169,157 | 19,810
Purchases of held-to-maturity investment securities | (349,579) | (146,738) | (13,057)
Proceeds from repayments or maturities of held-to-maturity investment securities | 53,654 | 59,894 | 15,505
Purchase of stock from Federal Home Loan Bank | (33,022) | (27,350) | (95,636)
Redemption of stock from Federal Home Loan Bank | 31,702 | 27,104 | 97,160
Net decrease (increase) in loans held for investment | 72,489 | (229,311) | (300,210)
Proceeds from sale of residential loans | 59,844 | 0 | 0
Proceeds from sale of real estate held for sale | 0 | 0 | 21,060
Capital expenditures | (314,524) | (383,895) | (457,520)
Proceeds from sale of low income housing investments | 0 | 6,725 | 1
Contributions to low income housing investments | (16,131) | (9,403) | (6,974)
Other, net | 27 | 3,412 | 13,291
Net cash used in investing activities | (1,179,592) | (1,413,648) | (541,709)
Cash flows from financing activities |  |  |
Net increase in deposit liabilities | 785,255 | 1,115,055 | 113,050
Net increase (decrease) in short-term borrowings with original maturities of three months or less | (10,493) | (71,219) | 86,718
Proceeds from issuance of short-term debt | 0 | 165,000 | 75,000
Repayment of short-term debt | (65,000) | (150,000) | (50,000)
Net increase (decrease) in other bank borrowings with original maturities of three months or less | (1,365) | (25,440) | 5,070
Proceeds from issuance of other bank borrowings | 0 | 30,000 | 0
Repayment of other bank borrowings | 0 | (30,000) | 0
Proceeds from issuance of long-term debt | 285,886 | 415,997 | 289,349
Repayment of long-term debt and funds transferred for repayment of long-term debt | (82,262) | (178,969) | (287,285)
Withheld shares for employee taxes on vested share-based compensation | (2,006) | (5,700) | (997)
Common stock dividends | (148,643) | (144,096) | (139,463)
Preferred stock dividends of subsidiaries | (1,890) | (1,890) | (1,890)
Other | (3,080) | (3,203) | (1,836)
Net cash used in financing activities | 756,402 | 1,115,535 | 87,716
Net increase (decrease) in cash and equivalents | (47,517) | 131,294 | 58,477
Cash, cash equivalents and restricted cash, January 1 | 358,979 | 227,685 | 169,208
Cash, cash equivalents and restricted cash, December 31 | 311,462 | 358,979 | 227,685
Less: Restricted cash | (5,911) | (17,558) | (30,872)
Cash and cash equivalents, December 31 | $ 305,551 | $ 341,421 | $ 196,813

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- Definition The aggregate amount of cash outflow for loans purchased and created with the intention to resell them in the near future. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3461-108585 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3151-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562 + Details
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- Definition Amount of cash outflow to acquire Federal Home Loan Bank (FHLB) stock. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow through purchase of long-term held-to-maturity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562 + Details
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