Pension Plan (Details) - Change in unrecognized pension costs recorded in other comprehensive loss - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension Plan (Details) - Change in unrecognized pension costs recorded in other comprehensive loss [Line Items]
Balance at beginning of year	$ 8,001,000	$ 9,051,000
Net actuarial loss	(62,000)	(428,000)
Recognized loss	(290,000)	(622,000)
Balance at end of year	$ 7,649,000	$ 8,001,000