Cash Equivalents and Investments (Tables)

9 Months Ended

Sep. 30, 2016

Cash and Cash Equivalents [Abstract]

Summary of cash and available-for-sale securities

							Reported as:
	Amortized Cost		Unrealized Gains		Estimated Fair Value		Cash and Cash Equivalents		Short-Term Investments
(In thousands)
September 30, 2016
Cash	$	96,404	$	—	$	96,404	$	96,404	$	—
Money market funds	190		—		190		190		—
Commercial paper	17,981		—		17,981		9,996		7,985
Total	$	114,575	$	—	$	114,575	$	106,590	$	7,985
December 31, 2015
Cash	$	124,082	$	—	$	124,082	$	124,082	$	—
Money market funds	94,801		—		94,801		94,801		—
Corporate securities	799		670		1,469		—		1,469
Total	$	219,682	$	670	$	220,352	$	218,883	$	1,469