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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2019
Stockholders Equity Note [Abstract]  
Schedule of Changes in Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss - Changes in accumulated other comprehensive loss attributable to NL stockholders, including amounts resulting from our investment in Kronos Worldwide (see Note 6), are presented in the table below.

 

 

Years ended December 31,

 

 

2017

 

 

2018

 

 

2019

 

 

(In thousands)

 

Accumulated other comprehensive loss, net of tax:

 

 

 

 

 

 

 

 

 

 

 

Currency translation:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(175,859

)

 

$

(164,467

)

 

$

(172,434

)

Other comprehensive income (loss)

 

11,392

 

 

 

(7,967

)

 

 

(409

)

Balance at end of year

$

(164,467

)

 

$

(172,434

)

 

$

(172,843

)

 

 

 

 

 

 

 

 

 

 

 

 

Defined benefit pension plans:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(76,710

)

 

$

(72,951

)

 

$

(75,286

)

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Amortization of prior service cost and net losses

  included in net periodic pension cost

 

2,956

 

 

 

(2,335

)

 

 

3,539

 

Net actuarial gain (loss) arising during the year

 

803

 

 

 

-

 

 

 

(6,510

)

Balance at end of year

$

(72,951

)

 

$

(75,286

)

 

$

(78,257

)

 

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

20,473

 

 

$

46,069

 

 

$

-

 

Change in accounting principle

 

-

 

 

 

(46,069

)

 

 

-

 

Balance at beginning of year, as adjusted

 

20,473

 

 

 

-

 

 

 

-

 

Other comprehensive income:

 

 

 

 

 

 

 

 

 

 

 

Unrealized gain arising during the year

 

25,596

 

 

 

-

 

 

 

-

 

Balance at end of year

$

46,069

 

 

$

-

 

 

$

-

 

 

 

 

 

 

 

 

 

 

 

 

 

Interest rate swap:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(390

)

 

$

-

 

 

$

-

 

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Unrealized losses arising during the year

 

(296

)

 

 

-

 

 

 

-

 

Reclassification adjustments for amounts included in

  equity in earnings of Kronos

 

686

 

 

 

-

 

 

 

-

 

Balance at end of year

$

-

 

 

$

-

 

 

$

-

 

 

 

 

 

 

 

 

 

 

 

 

 

Other:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(360

)

 

$

(388

)

 

$

(550

)

Other comprehensive loss

 

(28

)

 

 

(162

)

 

 

(40

)

Balance at end of year

$

(388

)

 

$

(550

)

 

$

(590

)

 

 

 

 

 

 

 

 

 

 

 

 

Total accumulated other comprehensive loss, net of tax:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(232,846

)

 

$

(191,737

)

 

$

(248,270

)

Change in accounting principle

 

-

 

 

 

(46,069

)

 

 

-

 

Balance at beginning of year, as adjusted

 

(232,846

)

 

 

(237,806

)

 

 

(248,270

)

Other comprehensive income (loss)

 

41,109

 

 

 

(10,464

)

 

 

(3,420

)

Balance at end of year

$

(191,737

)

 

$

(248,270

)

 

$

(251,690

)