Interim Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ 21,231	$ (2,899)
Other comprehensive income (loss):
Unrealized gains (losses) on investments in restricted marketable debt securities	3,225	(2,798)
Reclassification adjustment for realized gains on sale of securities		(11)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(677)	590
Other comprehensive gain (loss), net of tax	2,548	(2,219)
Net loss attributable to noncontrolling interest	38	108
Comprehensive income (loss) attributable to National HealthCare Corporation	$ 23,817	$ (5,010)