Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2019

Stockholders Equity Note [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) attributable to NL stockholders, including amounts resulting from our investment in Kronos Worldwide (see Note 5), are presented in the table below.

	Three months ended
	March 31,
	2018			2019
	(In thousands)
Accumulated other comprehensive loss, net of tax:
Marketable securities:
Balance at beginning of period	$	46,069		$	-
Change in accounting principle		(46,069	)		-
Balance at end of period	$	-		$	-
Currency translation:
Balance at beginning of period	$	(164,467	)	$	(172,434	)
Other comprehensive income (loss)		2,591			(25	)
Balance at end of period	$	(161,876	)	$	(172,459	)
Defined benefit pension plans:
Balance at beginning of period	$	(72,951	)	$	(75,286	)
Other comprehensive income -    amortization of net losses included    in net periodic pension cost		983			828
Balance at end of period	$	(71,968	)	$	(74,458	)
OPEB plans:
Balance at beginning of period	$	(388	)	$	(550	)
Other comprehensive loss -    amortization of net gains included in net periodic OPEB cost		(73	)		(70	)
Balance at end of period	$	(461	)	$	(620	)
Total accumulated other comprehensive loss:
Balance at beginning of period	$	(191,737	)	$	(248,270	)
Change in accounting principle		(46,069	)		-
Balance at beginning of period, as adjusted		(237,806	)		(248,270	)
Other comprehensive income		3,501			733
Balance at end of period	$	(234,305	)	$	(247,537	)