10. Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive loss are as follows:


	March 31, 2012		March 31, 2011		December 31, 2011
	(In thousands)
Currency translation adjustments	$	(243,560)	$	(168,580)	$	(298,863	)
Defined benefit pension and other postretirement plans, net of tax		(170,875)		(131,781)		(172,398	)
Net unrealized gain (loss) on derivative instruments, net of tax		18,890		(18,220)		24,616

	$	(395,545)	$	(318,581)	$	(446,645	)

Currency Translation Adjustments

Mattel’s reporting currency is the US dollar. The translation of its net investment in subsidiaries with non-US dollar functional currencies subjects Mattel to currency exchange rate fluctuations in its results of operations and financial position. Assets and liabilities of subsidiaries with non-US dollar functional currencies are translated into US dollars at fiscal period-end exchange rates. Income, expense, and cash flow items are translated at weighted average exchange rates prevailing during the fiscal period. The resulting currency translation adjustments are recorded as a component of accumulated other comprehensive loss within stockholders’ equity. Currency translation adjustments resulted in a net gain of $55.3 million and $53.2 million for the three months ended March 31, 2012 and 2011, respectively, with gains primarily from the strengthening of the Euro, Mexican peso, Brazilian real, and British pound sterling against the US dollar.