Income Taxes, Differences Between Federal Tax Rate and Company's Effective Tax Rate for Results of Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Abstract]
U.S. tax at statutory rate	$ 8,483	$ 9,307	$ 11,782
State income taxes, net of federal benefit	2,135	2,079	2,478
Shortfall (excess) equity compensation deduction	123	149	(246)
Non-deductible expenses	710	629	1,258
Return to provision adjustments	705	0	0
Total income tax provision	$ 12,156	$ 12,164	$ 15,272
U.S. tax at statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal benefit and tax reform	5.30%	4.70%	4.40%
Shortfall (excess) equity compensation deduction	0.30%	0.30%	(0.40%)
Nondeductible expenses	1.80%	1.40%	2.20%
Return to provision adjustments	1.70%	0.00%	0.00%
Total	30.10%	27.40%	27.20%