Pension and Other Postretirement Plans - Schedule of Amounts Recognized in Consolidated Financial Statements and Accumulated Other Comprehensive Income (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Pension Plans
Amounts recognized in the Company's Consolidated Financial Statements:
Assets	$ 1,533,000	$ 1,185,000
Liabilities	0	0
Net amount recognized	1,533,000	1,185,000
Amounts recognized in accumulated other comprehensive income (loss):
Net (gain) loss	4,273,000	3,642,000
Prior service cost	0	0
Net amount recognized	4,273,000	3,642,000
Chairman and President Non-Qualified Defined Benefit Plans
Amounts recognized in the Company's Consolidated Financial Statements:
Assets	0	0
Liabilities	(31,522,000)	(44,448,000)
Net amount recognized	(31,522,000)	(44,448,000)
Amounts recognized in accumulated other comprehensive income (loss):
Net (gain) loss	(1,509,000)	13,925,000
Prior service cost	286,000	345,000
Net amount recognized	(1,223,000)	14,270,000
Defined Benefit Postretirement Healthcare Plans
Amounts recognized in the Company's Consolidated Financial Statements:
Assets	0	0
Liabilities	(4,406,000)	(6,160,000)
Net amount recognized	(4,406,000)	(6,160,000)
Amounts recognized in accumulated other comprehensive income (loss):
Net (gain) loss	(596,000)	1,539,000
Prior service cost	0	0
Net amount recognized	$ (596,000)	$ 1,539,000