Changes in accumulated other comprehensive income (loss) attributable to NL stockholders for the three months ended March 31, 2013 and 2014 are presented in the table below.

	Three months ended March 31,
	2013			2014
	(In thousands)
Accumulated other comprehensive loss, net of tax:
Marketable securities:
Balance at beginning of period	$	105,419		$	154,169
Other comprehensive income (loss) - unrealized gains (losses) arising during the year		33,901			(83,931	)
Balance at end of period	$	139,320		$	70,238
Currency translation:
Balance at beginning of period	$	(135,165	)	$	(133,816	)
Other comprehensive loss		(5,390	)		(514	)
Balance at end of period	$	(140,555	)	$	(134,330	)
Defined benefit pension plans:
Balance at beginning of period	$	(66,402	)	$	(56,644	)
Other comprehensive income - amortization of net losses included in net periodic pension cost		699			537
Balance at end of period	$	(65,703	)	$	(56,107	)
OPEB plans:
Balance at beginning of period	$	895		$	1,275
Other comprehensive loss - amortization of prior service credit and net gains included in net periodic OPEB cost		(144	)		(157	)
Balance at end of period	$	751		$	1,118
Total accumulated other comprehensive loss:
Balance at beginning of period	$	(95,253	)	$	(35,016	)
Other comprehensive income (loss)		29,066			(84,065	)
Balance at end of period	$	(66,187	)	$	(119,081	)