v3.24.2.u1
Debt Fair Value of Long Term Debt - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Debt Instrument [Line Items]      
Gross long-term debt $ 1,585,986 $ 1,586,344 $ 1,545,553
Unamortized debt issuance costs (10,369) (10,044) (10,261)
Long-term Debt 1,575,617 1,576,300 1,535,292
Estimated fair value 1,393,946 1,447,941 1,385,612
Northwest Natural Gas Company [Member]      
Debt Instrument [Line Items]      
Gross long-term debt 1,374,700 1,374,700 1,334,700
Unamortized debt issuance costs (9,634) (9,968) (10,141)
Long-term Debt 1,365,066 1,364,732 1,324,559
Estimated fair value $ 1,182,455 $ 1,236,559 $ 1,176,519