Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Comprehensive income attributable to common stockholders
Net income (loss)	$ 15,810	$ 5,342	$ (747)
Other comprehensive income (loss):
Unrealized (loss) gain on available-for-sale securities	(199)	(14)	(46)
Unrealized interest rate swap gain (loss)	5,641	2,841	(3,213)
Other comprehensive income (loss) before taxes	6,660	4,024	(4,096)
(Provision) benefit for income taxes related to other comprehensive income items	(1,866)	(1,126)	1,147
Other comprehensive income (loss)	4,794	2,898	(2,949)
Comprehensive income (loss)	20,604	8,240	(3,696)
Comprehensive income (loss) attributable to non-controlling interests	2	(6)	(7)
Comprehensive income (loss) attributable to common stockholders	20,602	8,246	(3,689)
Benefit plan adjustments
Other comprehensive income (loss):
Benefit plan adjustments	(212)	866	(215)
SERP liability adjustments
Other comprehensive income (loss):
Benefit plan adjustments	$ 1,430	$ 331	$ (622)