CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 19,209	$ 13,866
Other comprehensive income (loss), net of tax:
Currency translation	1,580	545
Defined benefit pension plans	873	1,151
Other postretirement benefit plans	(68)	(71)
Total other comprehensive income, net	2,385	1,625
Comprehensive income	21,594	15,491
Comprehensive income attributable to noncontrolling interest	652	609
Comprehensive income attributable to NL stockholders	$ 20,942	$ 14,882

Other comprehensive income loss other postretirement benefit plans net of tax.

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