Investments

6 Months Ended

Jun. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

Cash, cash equivalents and investments as of June 30, 2017 included the following:

(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	242,650	$	—	$	—		$	242,650
Total cash and cash equivalents	$	242,650	$	—	$	—		$	242,650
Investments:
Commercial paper (due within 1 year)	$	33,480	$	—	$	—		$	33,480
Corporate bonds (due within 1 year)	31,871		—		(82		)	31,789
Total investments	$	65,351	$	—	$	(82	)	$	65,269
Total cash, cash equivalents and investments	$	308,001	$	—	$	(82	)	$	307,919

Cash, cash equivalents and investments as of December 31, 2016 included the following:

(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	196,445	$	—	$	—		$	196,445
Commercial paper	1,500		—		—			1,500
Total cash and cash equivalents	$	197,945	$	—	$	—		$	197,945
Investments:
Certificates of deposit (due within 1 year)	$	6,920	$	4	$	(1	)	$	6,923
Corporate bonds (due within 1 year)	27,615		4		(75		)	27,544
Government agencies (due within 1 year)	1,250		—		—			1,250
Total investments	$	35,785	$	8	$	(76	)	$	35,717
Total cash, cash equivalents and investments	$	233,730	$	8	$	(76	)	$	233,662