Summary of Significant Accounting Policies, Master Settlement Agreement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Master Settlement Agreement [Abstract]
Term for restricted withdrawal of principal from MSA escrow account	25 years
Fair Value of MSA Escrow Account, More than 12 Months [Abstract]
Estimated fair value, more than 12 months	$ 6,750	$ 6,750
Fair Value of MSA Escrow Account [Abstract]
Cost	32,073	32,073
Gross unrealized gains (losses)	(3,646)	(3,389)
Estimated fair value	28,427	28,684
Maturities of U.S. Governmental Agency Obligations [Abstract]
Less than one year	3,250
One to five years	13,775
Five to ten years	11,159
Greater than ten years	1,955
Total	30,139
Master Settlement Agreement Escrow Account by Sales Year [Abstract]
1999	211	211
2000	1,017	1,017
2001	1,673	1,673
2002	2,271	2,271
2003	4,249	4,249
2004	3,714	3,714
2005	4,553	4,553
2006	3,847	3,847
2007	4,167	4,167
2008	3,364	3,364
2009	1,619	1,619
2010	406	406
2011	193	193
2012	199	199
2013	173	173
2014	143	143
2015	101	101
2016	91	91
2017	82	82
Total	32,073	32,073
Cash and Cash Equivalents [Member]
Fair Value of MSA Escrow Account [Abstract]
Cost	1,934	1,929
Gross unrealized gains (losses)	0	0
Estimated fair value	1,934	1,929
U.S. Governmental Agency Obligations [Member]
Fair Value of MSA Escrow Account, Less than 12 Months [Abstract]
Cost, less than 12 months	1,196	0
Gross unrealized gains (losses), less than 12 months	6	0
Estimated fair value, less than 12 months	1,202	0
Fair Value of MSA Escrow Account, More than 12 Months [Abstract]
Cost, more than 12 months	28,943	30,144
Gross unrealized gains (losses), more than 12 months	(3,652)	(3,389)
Estimated fair value, more than 12 months	$ 25,291	$ 26,755