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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2016
Stockholders Equity Note [Abstract]  
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)

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 6), are presented in the table below.

 

 

Years ended December 31,

 

 

2014

 

 

2015

 

 

2016

 

 

(In thousands)

 

Accumulated other comprehensive income (loss), net of tax:

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

154,169

 

 

$

47,112

 

 

$

195

 

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Unrealized gain (loss) arising during the year

 

(107,057

)

 

 

(48,647

)

 

 

20,278

 

Less reclassification adjustment for amounts included

 

 

 

 

 

 

 

 

 

 

 

in realized loss

 

-

 

 

 

1,730

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

47,112

 

 

$

195

 

 

$

20,473

 

 

 

 

 

 

 

 

 

 

 

 

 

Currency translation:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(133,816

)

 

$

(154,173

)

 

$

(172,384

)

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Arising during the year

 

(20,357

)

 

 

(18,211

)

 

 

(3,475

)

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

(154,173

)

 

$

(172,384

)

 

$

(175,859

)

 

 

 

 

 

 

 

 

 

 

 

 

Interest rate swap:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

-

 

 

$

-

 

 

$

(445

)

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Unrealized gains (losses) arising during the year

 

-

 

 

 

(560

)

 

 

(393

)

Reclassification adjustments for amounts included in equity

  in earnings of Kronos

 

-

 

 

 

115

 

 

 

448

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

-

 

 

$

(445

)

 

$

(390

)

 

 

 

 

 

 

 

 

 

 

 

 

Defined benefit pension plans:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(56,644

)

 

$

(75,260

)

 

$

(72,712

)

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Amortization of prior service cost and net losses

 

 

 

 

 

 

 

 

 

 

 

included in net periodic pension cost

 

2,107

 

 

 

2,884

 

 

 

2,655

 

Net actuarial gain (loss) arising during the year

 

(20,723

)

 

 

(336

)

 

 

(6,653

)

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

(75,260

)

 

$

(72,712

)

 

$

(76,710

)

 

 

 

 

 

 

 

 

 

 

 

 

OPEB plans:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

1,275

 

 

$

282

 

 

$

(12

)

Other comprehensive income (loss):

 

 

 

 

 

 

 

 

 

 

 

Amortization of prior service credit and net losses

 

 

 

 

 

 

 

 

 

 

 

included in net periodic OPEB cost

 

(626

)

 

 

(547

)

 

 

(529

)

Net actuarial gain (loss) arising during year

 

(367

)

 

 

253

 

 

 

181

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

282

 

 

$

(12

)

 

$

(360

)

 

 

 

 

 

 

 

 

 

 

 

 

Total accumulated other comprehensive income (loss), net

   of tax:

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

$

(35,016

)

 

$

(182,039

)

 

$

(245,358

)

Other comprehensive income (loss)

 

(147,023

)

 

 

(63,319

)

 

 

12,512

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at end of year

$

(182,039

)

 

$

(245,358

)

 

$

(232,846

)