XML 49 R37.htm IDEA: XBRL DOCUMENT
v3.21.1

Accounts receivable and allowance for doubtful accounts Receivables and allowance for expected credit losses (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Credit Loss [Abstract] |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] | Details of the Company's expected credit losses were as follows:
| Electric | Natural gas distribution | Pipeline | Construction materials and contracting | Construction services | Total
| (In thousands)
At December 31, 2020 | $ | 899 |  | $ | 2,571 |  | $ | 2 |  | $ | 6,164 |  | $ | 5,722 |  | $ | 15,358 |
Current expected credit loss provision | 538 |  | 1,273 |  | — |  | (1,049) |  | (1,079) |  | (317) |
Less write-offs charged against the allowance | 888 |  | 1,107 |  | — |  | 273 |  | 401 |  | 2,669 |
Credit loss recoveries collected | 129 |  | 213 |  | — |  | — |  | — |  | 342 |
At March 31, 2021 | $ | 678 |  | $ | 2,950 |  | $ | 2 |  | $ | 4,842 |  | $ | 4,242 |  | $ | 12,714 |
| Electric | Natural gas distribution | Pipeline | Construction materials and contracting | Construction services | Total
| (In thousands)
At January 1, 2020 | $ | 328 |  | $ | 1,056 |  | $ | — |  | $ | 5,357 |  | $ | 1,756 |  | $ | 8,497 |
Current expected credit loss provision | 555 |  | 1,156 |  | — |  | 694 |  | 1,150 |  | 3,555 |
Less write-offs charged against the allowance | 500 |  | 624 |  | — |  | 68 |  | 73 |  | 1,265 |
Credit loss recoveries collected | 109 |  | 229 |  | — |  | — |  | — |  | 338 |
At March 31, 2020 | $ | 492 |  | $ | 1,817 |  | $ | — |  | $ | 5,983 |  | $ | 2,833 |  | $ | 11,125 |

X
- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_AccountsReceivableAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CreditLossAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration