CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income (loss)	$ (2,591)	$ 31,057	$ (8,530)	$ 50,266
Other comprehensive income (loss), net of tax:
Currency translation	(1,219)	(8,741)	(2,885)	(7,161)
Defined benefit pension plans	4,676	856	5,069	1,729
Marketable debt securities	(121)		(169)
Other postretirement benefit plans	(58)	(63)	(118)	(131)
Total other comprehensive income (loss), net	3,278	(7,948)	1,897	(5,563)
Comprehensive income (loss)	687	23,109	(6,633)	44,703
Comprehensive income attributable to noncontrolling interest	525	805	1,298	1,457
Comprehensive income (loss) attributable to NL stockholders	$ 162	$ 22,304	$ (7,931)	$ 43,246