Capitalization (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended						12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Nov. 30, 2021	Sep. 30, 2021	Nov. 30, 2020	May 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Capitalization (Details) [Line Items]
Remain shares registered (in Shares)							200,000
Authorized shares (in Shares)							700,000
Preferred Stock, Shares Outstanding (in Shares)		20					20	20
Convertible preferred stock (in Dollars per share)							$ 7
Principal balance interest date							0.00%
Loan amount							$ 10.0
Participate rate program							0.00%
Borrowed loan		$ 2.6
Carrying amount							$ 159.1	$ 212.3
Construction carrying amount		$ 23.5					$ 21.4	$ 23.5
Preferred Stock [Member]
Capitalization (Details) [Line Items]
Preferred Stock, Shares Authorized (in Shares)		120,000					120,000	120,000
Preferred Stock, Shares Outstanding (in Shares)		21,000					21,000	21,000
Preferred stock dividends
Outside Director Stock Compensation Plan [Member]
Capitalization (Details) [Line Items]
Common stock granted and issued under plan (in Shares)							2,664	3,444	4,074
Maximum number of shares authorized for grant (in Shares)							100,000
Shares remain available for future awards (in Shares)							46,461
Construction Loan [Member]
Capitalization (Details) [Line Items]
Current construction loan borrowings							0.00%
New Jersey Infrastructure Bank [Member]
Capitalization (Details) [Line Items]
Market interest rate							0.00%
Principal balance interest date							25.00%
Market based interest rate							75.00%
Private placement transactions						$ 100.0
Maturity date						Dec. 31, 2023
Program loan amount		$ 5.0
FMB [Member]
Capitalization (Details) [Line Items]
Total amount issued	$ 52.2
Received redeem outstanding										$ 45.5
Proceeds from private placement			$ 19.5		$ 40.0
Percentage of principal with stated interest rate			2.79%		2.90%
Maturity date			2041		2050
Series 2022A [Member]
Capitalization (Details) [Line Items]
Total amount issued	$ 16.2
Interest rate	2.70%
Series 2022B [Member]
Capitalization (Details) [Line Items]
Total amount issued	$ 36.0
Interest rate	3.00%
Series RR [Member]
Capitalization (Details) [Line Items]
Received redeem outstanding										22.5
Series SS [Member]
Capitalization (Details) [Line Items]
Received redeem outstanding										$ 23.0
Tidewater [Member]
Capitalization (Details) [Line Items]
Percentage of principal with stated interest rate				3.94%
Maturity date				2046
Borrowing amount				$ 20.0
FMB Series 2020 [Member]
Capitalization (Details) [Line Items]
Outstanding long term debt							$ 40.0
Private Placement Loan [Member]
Capitalization (Details) [Line Items]
Proceeds from private placement			$ 45.5
Percentage of principal with stated interest rate			2.90%
Maturity date			2051
Delaware State Revolving Fund [Member]
Capitalization (Details) [Line Items]
Limited first loan							10.0
Maturity date		2044
Outstanding long term debt							9.2
Amortizing Secured Notes [Member]
Capitalization (Details) [Line Items]
Outstanding long term debt							44.9
New Jersey Economic Development Authority [Member]
Capitalization (Details) [Line Items]
Outstanding long term debt							63.6
New Jersey Infrastructure Bank [Member]
Capitalization (Details) [Line Items]
Outstanding long term debt							$ 83.7
All Long Term Debt [Member]
Capitalization (Details) [Line Items]
Weighted average interest rate							2.98%	2.83%
FMB Series 2021 [Member]
Capitalization (Details) [Line Items]
Outstanding long term debt							$ 65.0
Dividend Reinvestment and Common Stock Purchase Plan [Member]
Capitalization (Details) [Line Items]
Shares issued							$ 10.3
Common stock purchase, percentage							3.00%
Discount offering shares (in Shares)							200,000
Convertible Preferred Stock [Member]
Capitalization (Details) [Line Items]
Convertible preferred stock (in Dollars per share)							$ 7
Outstanding convertible stock, percentage		10.00%						10.00%