XML 42 R30.htm IDEA: XBRL DOCUMENT
v3.20.2

Notes Payable, Current Maturities and Debt (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Debt Disclosure [Abstract] |
Schedule of Short-term Debt | We had the following short-term debt outstanding in the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:
| September 30, 2020 | December 31, 2019
| Balance Outstanding | Letters of Credit (a) | Balance Outstanding | Letters of Credit (a)
Revolving Credit Facility | $ | — |  | $ | 24,588 |  | $ | — |  | $ | 30,274 |
CP Program | 84,320 |  | — |  | 349,500 |  | — |
Total | $ | 84,320 |  | $ | 24,588 |  | $ | 349,500 |  | $ | 30,274 |
_______________ (a) Letters of credit are off-balance sheet commitments that reduce the borrowing capacity available on our corporate Revolving Credit Facility.
Credit Facility and Short Term Debt Covenants | Our Revolving Credit Facility and term loans require compliance with the following financial covenant, which we were in compliance with at September 30, 2020:
| As of September 30, 2020 |  | Covenant Requirement
Consolidated Indebtedness to Capitalization Ratio | 59.3% |  | Less than | 65%

X
- Definition Credit Facility and Short Term Debt Covenants + References No definition available. + Details
Name: | bkh_CreditFacilityAndShortTermDebtCovenantsTableTextBlock
Namespace Prefix: | bkh_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfShortTermDebtTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration