Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net income	$ 102,086	$ 65,288	$ 19,977
Other comprehensive income (loss):
Unrealized gains (losses) on investments in marketable debt securities	909	3,434	(12,946)
Reclassification adjustment for realized losses (gains) on sale of marketable debt securities	1,388	17	(129)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(409)	(523)	1,938
Other comprehensive income (loss), net of tax	1,888	2,928	(11,137)
Net (income) loss attributable to noncontrolling interest	(159)	1,510	2,468
Comprehensive income attributable to National HealthCare Corporation	$ 103,815	$ 69,726	$ 11,308