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10-K Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fair Value Disclosures [Abstract]              
Investments used to satisfy nonqualified benefit plans obligations $ 19,100   $ 19,100   $ 20,100 $ 21,600  
Net unrealized gain (loss) on investments used to satisfy obligations under nonqualified benefit plans $ 197 $ (1,600) $ 1,100 $ (2,600) $ (2,800) $ 1,400 $ 2,500