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Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2018
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

 

 

Six months ended

 

 

 

June 30,

 

 

June 30,

 

 

 

2017

 

 

2018

 

 

2017

 

 

2018

 

 

(In thousands)

 

 

 

 

 

 

 

 

 

Accumulated other comprehensive loss, net of tax:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

18,751

 

 

$

-

 

 

$

20,473

 

 

$

46,069

 

Change in accounting principle

 

$

-

 

 

$

-

 

 

$

-

 

 

$

(46,069

)

Balance at beginning of period, as adjusted

 

$

18,751

 

 

$

-

 

 

$

20,473

 

 

$

-

 

Other comprehensive income (loss) -

   unrealized gains (losses) arising

   during the year

 

 

(2,869

)

 

 

-

 

 

 

(4,591

)

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

15,882

 

 

$

-

 

 

$

15,882

 

 

$

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Currency translation:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

(174,088

)

 

$

(161,876

)

 

$

(175,859

)

 

$

(164,467

)

Other comprehensive income (loss)

 

 

2,925

 

 

 

(6,108

)

 

 

4,696

 

 

 

(3,517

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

(171,163

)

 

$

(167,984

)

 

$

(171,163

)

 

$

(167,984

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interest rate swap:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

(278

)

 

$

-

 

 

$

(390

)

 

$

-

 

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unrealized gains (losses) arising

during the year

 

 

(178

)

 

 

-

 

 

 

(177

)

 

 

-

 

Less reclassification adjustment for

   amounts included in interest expense

 

 

94

 

 

 

-

 

 

 

205

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

(362

)

 

$

-

 

 

$

(362

)

 

$

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Defined benefit pension plans:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

(75,843

)

 

$

(71,968

)

 

$

(76,710

)

 

$

(72,951

)

Other comprehensive income -

   amortization of net losses included

   in net periodic pension cost

 

 

393

 

 

 

974

 

 

 

1,260

 

 

 

1,957

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

(75,450

)

 

$

(70,994

)

 

$

(75,450

)

 

$

(70,994

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPEB plans:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

(408

)

 

$

(461

)

 

$

(360

)

 

$

(388

)

Other comprehensive loss -

amortization of net gains included in net periodic OPEB cost

 

 

(48

)

 

 

(65

)

 

 

(96

)

 

 

(138

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

(456

)

 

$

(526

)

 

$

(456

)

 

$

(526

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total accumulated other comprehensive loss:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

$

(231,866

)

 

$

(234,305

)

 

$

(232,846

)

 

$

(191,737

)

Change in accounting principle

 

$

-

 

 

$

-

 

 

$

-

 

 

$

(46,069

)

Balance at beginning of period, as adjusted

 

$

(231,866

)

 

$

(234,305

)

 

$

(232,846

)

 

$

(237,806

)

Other comprehensive income (loss)

 

 

317

 

 

 

(5,199

)

 

 

1,297

 

 

 

(1,698

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$

(231,549

)

 

$

(239,504

)

 

$

(231,549

)

 

$

(239,504

)