CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 5,094	$ 1,322
Other comprehensive income (loss), net of tax:
Currency translation	1,015	4,185
Defined benefit pension plans	86	317
Other postretirement benefit plans	1	(33)
Total other comprehensive income, net	1,102	4,469
Comprehensive income	6,196	5,791
Comprehensive income attributable to noncontrolling interest	750	655
Comprehensive income attributable to NL stockholders	$ 5,446	$ 5,136