Marketable Securities

12 Months Ended

Dec. 31, 2017

All marketable securities were classified as held-to-maturity as of the dates presented and the carrying amounts of held-to-maturity securities were as follows (in thousands):



December 31,	2017		2016
U.S. Government and agency obligations	$	17,910	$	10,002
Commercial paper	49,865		54,882
Total short-term marketable securities	67,775		64,884
U.S. Government and agency obligations	59,993		62,895
Corporate bonds	5,022		—
Total long-term marketable securities	65,015		62,895
Total marketable securities	$	132,790	$	127,779

Scheduled maturities of held-to-maturity investments were as follows (in thousands):



December 31, 2017
Due within one year	$	67,775
Due in one to five years	65,015
Total	$	132,790