Marketable Securities

6 Months Ended

Jun. 30, 2011

Marketable Securities

Marketable Securities

5. Marketable Securities

The Company's portfolio of available for sale securities as of June 30, 2011 was as follows (in thousands):

	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Corporate notes and bonds	$	129,052	$	1,619	$	(47	)	$	130,624
U.S. government and agency securities		6,874		34		(1	)		6,907
Foreign and municipal bonds		8,186		105		—			8,291
Certificates of deposit		35,434		1		(4	)		35,431
Total fixed income securities		179,546		1,759		(52	)		181,253
Publicly traded equity securities		1,091		—		(182	)		909
Total available for sale securities	$	180,637	$	1,759	$	(234	)	$	182,162

The Company's portfolio of available for sale securities as of December 31, 2010 was as follows (in thousands):

	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Corporate notes and bonds	$	122,198	$	2,301	$	(24	)	$	124,475
U.S. government and agency securities		4,469		31		(1	)		4,499
Foreign and municipal bonds		8,238		62		(23	)		8,277
Certificate of deposits		41,913		7		—			41,920
Total fixed income securities		176,818		2,401		(48	)		179,171
Publicly traded equity securities		1,091		16		(119	)		988
Total available for sale securities	$	177,909	$	2,417	$	(167	)	$	180,159

The following table summarizes the maturities of the Company's fixed income securities as of June 30, 2011 (in thousands):

	Cost		Estimated Fair Value
Less than 1 year	$	95,509	$	96,450
Due in 1 to 2 years		44,617		45,127
Due in 2 to 5 years		39,420		39,676
Total fixed income securities	$	179,546	$	181,253

The table below shows the fair value of investments in available for sale securities that have been in an unrealized loss position for less than 12 months or for 12 months or longer as of June 30, 2011 (in thousands):

	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized losses			Fair Value		Unrealized losses			Fair Value		Unrealized losses
Corporate notes and bonds	$	14,730	$	(47	)	$	—	$	—		$	14,730	$	(47	)
U.S. government and agency securities		999		(1	)		—		—			999		(1	)
Certificates of deposit		1,236		(4	)		—		—			1,236		(4	)
Total fixed income securities		16,965		(52	)		—		—			16,965		(52	)
Publicly traded equity securities		858		(66	)		51		(116	)		909		(182	)
Total available for sale securities	$	17,823	$	(118	)	$	51	$	(116	)	$	17,874	$	(234	)

The following table shows the fair value of investments in available for sale securities that have been in an unrealized loss position for less than 12 months or for 12 months or longer as of December 31, 2010 (in thousands):

	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized losses			Fair Value		Unrealized losses			Fair Value		Unrealized losses
Corporate notes and bonds	$	8,957	$	(24	)	$	—	$	—		$	8,957	$	(24	)
U.S. government and agency securities		999		(1	)		—		—			999		(1	)
Foreign and municipal bonds		4,009		(23	)		—		—			4,009		(23	)
Total fixed income securities		13,965		(48	)		—		—			13,965		(48	)
Publicly traded equity securities		—		—			48		(119	)		48		(119	)
Total available for sale securities	$	13,965	$	(48	)	$	48	$	(119	)	$	14,013	$	(167	)