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Condensed Statements of Cash Flows (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by operating activities | $ 510,064 | $ 495,777 | $ 768,374
Investments | (6,477) | (3,973) | (1,814)
Net cash used in investing activities | (638,881) | (885,878) | (630,243)
Proceeds from issuance of common stock | (149) | 88,767 | 3,385
Dividends paid | (176,915) | (171,354) | (166,405)
Repurchase of common stock | (7,399) | (6,701) | 0
Tax withholding on stock-based compensation | (4,904) | (4,127) | (362)
Net cash used in financing activities | 155,173 | 384,715 | (145,043)
Increase (decrease) in cash and cash equivalents | 26,356 | (5,386) | (6,912)
Cash and cash equivalents - beginning of year | 54,161 | 59,547 | 66,459
Cash and cash equivalents - end of year | 80,517 | 54,161 | 59,547
MDU Resources Group, Inc. [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by operating activities | 242,199 | 187,297 | 226,642
Investments in and advances to subsidiaries | (45,000) | (102,000) | (67,000)
Investments | (885) | (391) | (4)
Net cash used in investing activities | (45,885) | (102,391) | (67,004)
Proceeds from issuance of common stock | (149) | 88,767 | 3,385
Dividends paid | (176,915) | (171,354) | (166,405)
Repurchase of common stock | (3,525) | (2,992) | 0
Tax withholding on stock-based compensation | (2,398) | (1,949) | (163)
Net cash used in financing activities | (182,987) | (87,528) | (163,183)
Increase (decrease) in cash and cash equivalents | 13,327 | (2,622) | (3,545)
Cash and cash equivalents - beginning of year | 6,159 | 8,781 | 12,326
Cash and cash equivalents - end of year | $ 19,486 | $ 6,159 | $ 8,781

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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