A summary of the Company’s cash equivalents and short-term investments at March 31, 2014 is as follows (in thousands):


	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash Equivalents:
Money market funds	$	185,068	$	—	$	—		$	185,068
Certificates of deposit		1,097		—		—			1,097
Municipal securities		4,791		—		—			4,791

	$	190,956	$	—	$	—		$	190,956

Short-Term Investments:
U.S. government agency bonds	$	2,100	$	1	$	—		$	2,101
Corporate bonds and commercial paper		8,478		—		(5	)		8,473
International government bonds		9,134		1		(1	)		9,134
Municipal securities		21,949		6		(4	)		21,951
Certificates of deposit		15,018		1		—			15,019

	$	56,679	$	9	$	(10	)	$	56,678

A summary of the Company’s cash equivalents and short-term investments at December 31, 2013 is as follows (in thousands):


	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash Equivalents:
Money market funds	$	226,130	$	—	$	—		$	226,130
Certificates of deposit		998		—		—			998
Municipal securities		2,000		—		—			2,000

	$	229,128	$	—	$	—		$	229,128

Short-Term Investments:
U.S. government agency bonds	$	4,500	$	1	$	—		$	4,501
Corporate bonds and commercial paper		3,318		—		(1	)		3,317
Municipal securities		19,701		4		(2	)		19,703
Certificates of deposit		9,612		1		(1	)		9,612

	$	37,131	$	6	$	(4	)	$	37,133