CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) (Parenthetical) - shares shares in Thousands	6 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Common Stock, Shares Authorized	40,000	40,000
Common Stock, Shares Outstanding	17,604	17,522
Preferred Stock, Shares Authorized	120	120
Preferred Stock, Shares Outstanding	20	20
First Mortgage Bonds due 2023-2059 [Member]
Long term debt maturity period	2023 - 2059
First Mortgage Bonds due 2023-2059 [Member] \| Minimum [Member]
Interest rate	0.00%
First Mortgage Bonds due 2023-2059 [Member] \| Maximum [Member]
Interest rate	5.50%
Amortizing Secured Notes due 2028-2040 [Member]
Long term debt maturity period	2028 - 2046
Amortizing Secured Notes due 2028-2040 [Member] \| Minimum [Member]
Interest rate	3.94%
Amortizing Secured Notes due 2028-2040 [Member] \| Maximum [Member]
Interest rate	7.05%
State Revolving Trust Notes due 2022-2041 [Member]
Long term debt maturity period	2022 - 2041
State Revolving Trust Notes due 2022-2041 [Member] \| Minimum [Member]
Interest rate	2.00%
State Revolving Trust Notes due 2022-2041 [Member] \| Maximum [Member]
Interest rate	4.22%
Construction Loans [Member]
Interest rate	0.00%
Convertible Preferred Stock $7.00 Series [Member]
Preferred Stock, Shares Outstanding	10	10
Nonredeemable Preferred Stock $7.00 Series [Member]
Preferred Stock, Shares Outstanding	1	1
Nonredeemable Preferred Stock $4.75 Series [Member]
Preferred Stock, Shares Outstanding	10	10

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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