Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 29, 2012

Cash, Cash Equivalents and Investments [Abstract]

Summary of cash, cash equivalents and short-term investments

Cadence's cash, cash equivalents and short-term investments at fair value as of December 29, 2012 and December 31, 2011 were as follows:

	As of
	December 29, 2012		December 31, 2011
	(In thousands)
Cash and cash equivalents	$	726,357	$	601,602
Short-term investments	100,704		3,037
Cash, cash equivalents and short-term investments	$	827,061	$	604,639

Summary of cash and cash equivalents

The following table summarizes Cadence's cash and cash equivalents at fair value as of December 29, 2012 and December 31, 2011:

	As of
	December 29, 2012		December 31, 2011
	(In thousands)
Cash and interest bearing deposits	$	160,023	$	117,500
Money market funds	566,334		484,102
Total cash and cash equivalents	$	726,357	$	601,602

Summary of short-term investments

The following tables summarize Cadence's short-term investments as of December 29, 2012 and December 31, 2011:

	As of December 29, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Corporate debt securities	$	31,313	$	57	$	(11	)	$	31,359
Bank certificates of deposit	27,805		21		—			27,826
United States Treasury securities	23,213		26		—			23,239
United States government agency securities	10,245		13		—			10,258
Commercial paper	5,777		6		—			5,783
Marketable debt securities	98,353		123		(11		)	98,465
Marketable equity securities	1,817		422		—			2,239
Total short-term investments	$	100,170	$	545	$	(11	)	$	100,704

	As of December 31, 2011
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Marketable equity securities	$	1,830	$	1,207	$	—	$	3,037
Total short-term investments	$	1,830	$	1,207	$	—	$	3,037

Contractual maturity of marketable debt investments

The amortized cost and estimated fair value of marketable debt securities included in short-term investments as of December 29, 2012, by contractual maturity, are shown in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in less than one year	$	57,447	$	57,491
Due in one to three years	40,906		40,974
Total marketable debt securities included in short-term investments	$	98,353	$	98,465

Summary of realized gains from sale of available-for-sale securities

Realized gains from the sale of marketable debt and equity securities for fiscal 2012, 2011 and 2010 were as follows:

	2012		2011		2010
	(In thousands)
Gains on sale of marketable debt and equity securities	$	143	$	8,052	$	—

Amortization of premium or discount related to marketable debt investments

Amortization of premium or discount related to Cadence's marketable debt securities for fiscal 2012, 2011 and 2010 was as follows:

	2012			2011		2010
	(In thousands)
Amortization of premium or discount	$	(498	)	$	—	$	—

Carrying value of non-marketable securities

Cadence's non-marketable investments as of December 29, 2012 and December 31, 2011 were as follows:

	As of
	December 29, 2012		December 31, 2011
	(In thousands)
Cost method	$	3,038	$	6,157
Equity method	4,249		4,303
Total non-marketable investments	$	7,287	$	10,460

Net realized gains on the sale of non-marketable investments

Net realized gains on the sale of non-marketable investments for fiscal 2012, 2011 and 2010 were as follows:

	2012		2011		2010
	(In thousands)
Gains on sale of non-marketable investments	$	2,895	$	8,281	$	4,916

Write downs related to cost method investments

Cadence recorded write-downs related to cost method investments due to other-than-temporary declines in value during fiscal 2012, 2011 and 2010 as follows:

	2012		2011		2010
	(In thousands)
Write-down of cost method investments	$	1,103	$	—	$	1,500

Income or loss from equity method investments

Cadence recorded losses related to equity method investments during fiscal 2012, 2011 and 2010 as follows:

	2012		2011		2010
	(In thousands)
Equity losses from non-marketable investments	$	65	$	136	$	133