XML 69 R59.htm IDEA: XBRL DOCUMENT
v3.23.2

Receivables and allowance for expected credit losses (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Provision for credit losses |  |  |  |  | $ 5,862 | $ 2,485
Trade Accounts Receivable |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Balance | $ 6,351 | $ 4,154 | $ 5,030 | $ 4,310 | 4,154 | 4,310
Provision for credit losses | 2,097 | 3,765 | 497 | 1,988 |  |
Less write-offs charged against the allowance | 1,873 | 1,943 | 1,277 | 1,600 |  |
Credit loss recoveries collected | 298 | 375 | 285 | 332 |  |
Balance | 6,873 | 6,351 | 4,535 | 5,030 | 6,873 | 4,535
Electric | Trade Accounts Receivable |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Balance | 468 | 375 | 361 | 269 | 375 | 269
Provision for credit losses | 182 | 615 | 113 | 565 |  |
Less write-offs charged against the allowance | 316 | 667 | 234 | 597 |  |
Credit loss recoveries collected | 79 | 145 | 108 | 124 |  |
Balance | 413 | 468 | 348 | 361 | 413 | 348
Natural gas distribution | Trade Accounts Receivable |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Balance | 2,943 | 1,615 | 2,123 | 1,506 | 1,615 | 1,506
Provision for credit losses | 90 | 2,324 | 92 | 1,369 |  |
Less write-offs charged against the allowance | 1,454 | 1,225 | 939 | 932 |  |
Credit loss recoveries collected | 161 | 229 | 177 | 180 |  |
Balance | 1,740 | 2,943 | 1,453 | 2,123 | 1,740 | 1,453
Pipeline | Trade Accounts Receivable |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Balance | 2 | 2 | 2 | 2 | 2 | 2
Provision for credit losses | 0 | 0 | 0 | 0 |  |
Less write-offs charged against the allowance | 0 | 0 | 0 | 0 |  |
Credit loss recoveries collected | 0 | 0 | 0 | 0 |  |
Balance | 2 | 2 | 2 | 2 | 2 | 2
Construction services | Trade Accounts Receivable |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Balance | 2,938 | 2,162 | 2,544 | 2,533 | 2,162 | 2,533
Provision for credit losses | 1,825 | 826 | 292 | 54 |  |
Less write-offs charged against the allowance | 103 | 51 | 104 | 71 |  |
Credit loss recoveries collected | 58 | 1 | 0 | 28 |  |
Balance | $ 4,718 | $ 2,938 | $ 2,732 | $ 2,544 | $ 4,718 | $ 2,732

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-4 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on accounts receivable, from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_TradeAccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mdu_ElectricMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mdu_NaturalGasDistributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mdu_PipelineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mdu_ConstructionServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |