XML 62 R51.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Receivables and allowance for expected credit losses (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Provision for credit losses |  |  |  |  |  |  | $ 3,258 | $ (801)
Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | $ 9,565 | $ 10,156 | $ 9,716 | $ 10,748 | $ 12,714 | $ 15,358 | 9,716 | 15,358
Provision for credit losses | 1,015 | 509 | 1,735 | 357 | (841) | (317) |  |
Less write-offs charged against the allowance | 2,448 | 1,385 | 1,627 | 2,152 | 1,424 | 2,669 |  |
Credit loss recoveries collected | 294 | 285 | 332 | 353 | 299 | 342 |  |
Balance | 8,426 | 9,565 | 10,156 | 9,306 | 10,748 | 12,714 | 8,426 | 9,306
Electric | Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | 348 | 361 | 269 | 327 | 678 | 899 | 269 | 899
Provision for credit losses | 300 | 113 | 565 | 388 | (110) | 538 |  |
Less write-offs charged against the allowance | 399 | 234 | 597 | 525 | 341 | 888 |  |
Credit loss recoveries collected | 85 | 108 | 124 | 92 | 100 | 129 |  |
Balance | 334 | 348 | 361 | 282 | 327 | 678 | 334 | 282
Natural gas distribution | Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | 1,453 | 2,123 | 1,506 | 2,259 | 2,950 | 2,571 | 1,506 | 2,571
Provision for credit losses | 881 | 92 | 1,369 | 411 | (103) | 1,273 |  |
Less write-offs charged against the allowance | 1,822 | 939 | 932 | 1,178 | 787 | 1,107 |  |
Credit loss recoveries collected | 169 | 177 | 180 | 168 | 199 | 213 |  |
Balance | 681 | 1,453 | 2,123 | 1,660 | 2,259 | 2,950 | 681 | 1,660
Pipeline | Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
Provision for credit losses | 0 | 0 | 0 | 0 | 0 | 0 |  |
Less write-offs charged against the allowance | 0 | 0 | 0 | 0 | 0 | 0 |  |
Credit loss recoveries collected | 0 | 0 | 0 | 0 | 0 | 0 |  |
Balance | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
Construction materials and contracting | Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | 5,030 | 5,126 | 5,406 | 4,621 | 4,842 | 6,164 | 5,406 | 6,164
Provision for credit losses | (55) | 12 | (253) | 233 | 11 | (1,049) |  |
Less write-offs charged against the allowance | 75 | 108 | 27 | 184 | 232 | 273 |  |
Credit loss recoveries collected | 0 | 0 | 0 | 0 | 0 | 0 |  |
Balance | 4,900 | 5,030 | 5,126 | 4,670 | 4,621 | 4,842 | 4,900 | 4,670
Construction services | Trade Accounts Receivable |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Balance | 2,732 | 2,544 | 2,533 | 3,539 | 4,242 | 5,722 | 2,533 | 5,722
Provision for credit losses | (111) | 292 | 54 | (675) | (639) | (1,079) |  |
Less write-offs charged against the allowance | 152 | 104 | 71 | 265 | 64 | 401 |  |
Credit loss recoveries collected | 40 | 0 | 28 | 93 | 0 | 0 |  |
Balance | $ 2,509 | $ 2,732 | $ 2,544 | $ 2,692 | $ 3,539 | $ 4,242 | $ 2,509 | $ 2,692

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: 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(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + 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_ConstructionMaterialsAndContractingMember
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: |