Investments

Cash equivalents consist of short-term marketable securities with original maturities less than 90 days. Short-term investments primarily consist of time deposits, commercial paper, and government and corporate bonds with maturities of less than one year. Long-term investments primarily consist of government and corporate bonds with maturities of less than two years.

Effective April 1, 2012, we began reporting all securities in our investment portfolio as available-for-sale. The change resulted in the transfer of investments with an aggregate carrying amount of $1.0 billion from held-to-maturity to available-for-sale, with gross unrealized gains of $0.7 million and gross unrealized losses of $0.7 million. The unrealized gains and losses, net of the related tax effects, were recorded to accumulated other comprehensive income. The decision to transfer the securities to available-for-sale is intended to provide us with financial flexibility in determining whether to hold our investment securities to maturity. Such change contemplates the possibility that securities may be liquidated prior to maturity as we manage through changing market conditions.

Available-for-sale securities are recorded at fair value with the unrealized gains and losses reflected in accumulated other comprehensive income until realized. Realized gains and losses from the sale of available-for-sale securities, if any, are determined on a specific identification basis.

We regularly review investment securities for impairment based on both quantitative and qualitative criteria that include the extent to which cost exceeds fair value, the duration of any market decline, and the financial health of and specific prospects for the issuer. Unrealized losses that are other than temporary are recognized in earnings.

Available-for-sale investments at September 29, 2012 were as follows:



(In thousands)	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value

Cash equivalents:
Money market funds	$	64,156	$	—	$	—		$	64,156
Time deposits	10,971		—		—			10,971
Total cash equivalents	75,127		—		—			75,127

Short-term investments:
Time deposits	86,339		44		(2		)	86,381
Commercial paper	64,000		18		(40		)	63,978
Government and corporate bonds	599,990		617		(71		)	600,536
Total short-term investments	750,329		679		(113		)	750,895

Long-term investments:
Time deposits	5,700		2		(9		)	5,693
Government and corporate bonds	446,981		426		(101		)	447,306
Total long-term investments	452,681		428		(110		)	452,999

Total available-for-sale investments	$	1,278,137	$	1,107	$	(223	)	$	1,279,021

At December 31, 2011, we held cash equivalents, short-term investments and long-term investments of $131.3 million, $531.6 million and $359.3 million, respectively. Investments at December 31, 2011 were classified as held-to-maturity and stated at amortized cost.

We sold available-for-sale investments for proceeds of $8.5 million during the nine months ended September 29, 2012, resulting in an insignificant gain.