Changes in accumulated other comprehensive income (loss) attributable to NL stockholders for the three and nine months ended September 30, 2012 and 2013 are presented in the table below.

	Three months ended September 30,
	2012			2013				2012				2013
	(In thousands)
Accumulated other comprehensive loss, net of tax:
Marketable securities:
Balance at beginning of period	$	107,834			$	117,245			$	186,451			$	105,419
Other comprehensive income (loss)—unrealized gains (losses) arising during the year		(482	)			59,716				(79,099	)			71,542
Balance at end of period	$	107,352			$	176,961			$	107,352			$	176,961
Currency translation:
Balance at beginning of period	$	(137,447	)		$	(139,439	)		$	(133,041	)		$	(135,165	)
Other comprehensive income (loss)		8,286				4,155				3,880				(119	)
Balance at end of period	$	(129,161	)		$	(135,284	)		$	(129,161	)		$	(135,284	)
Defined benefit pension plans:
Balance at beginning of period	$	(58,347	)		$	(65,016	)		$	(59,478	)		$	(66,402	)
Other comprehensive income—amortization of net losses included in net periodic pension cost		556				692				1,687				2,078
Balance at end of period	$	(57,791	)		$	(64,324	)		$	(57,791	)		$	(64,324	)
OPEB plans:
Balance at beginning of period	$	1,068			$	607			$	1,344			$	895
Other comprehensive loss—amortization of prior service credit and net gains included in net periodic OPEB cost		(138	)			(144	)			(414	)			(432	)
Balance at end of period	$	930			$	463			$	930			$	463
Total accumulated other comprehensive loss:
Balance at beginning of period	$	(86,892	)		$	(86,603	)		$	(4,724	)		$	(95,253	)
Other comprehensive income (loss)		8,222				64,419				(73,946	)			73,069
Balance at end of period	$	(78,670	)		$	(22,184	)		$	(78,670	)		$	(22,184	)