CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income (loss)	$ 668	$ (8,356)	$ (7,862)	$ 41,910
Other comprehensive income (loss), net of tax:
Currency translation	(345)	(6,233)	(3,230)	(13,394)
Defined benefit pension plans	392	828	5,461	2,557
Marketable debt securities	85	0	(84)	0
Other postretirement benefit plans	(57)	(62)	(175)	(193)
Total other comprehensive income (loss), net	75	(5,467)	1,972	(11,030)
Comprehensive income (loss)	743	(13,823)	(5,890)	30,880
Comprehensive income attributable to noncontrolling interest	741	548	2,039	2,005
Comprehensive income (loss) attributable to NL stockholders	$ 2	$ (14,371)	$ (7,929)	$ 28,875