Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2016

Marketable Securities [Abstract]

Schedule of Marketable Securities

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)	September 30, 2016		December 31, 2015		September 30, 2015
U.S. Government and agency obligations	$	14,999	$	15,051	$	7,625
Commercial paper	39,864		9,992		9,982
Total short-term marketable securities	54,863		25,043		17,607
U.S. Government and agency obligations	52,908		80,652		70,646
Total long-term marketable securities	52,908		80,652		70,646
Total marketable securities	$	107,771	$	105,695	$	88,253

Held-to-maturity Securities

Scheduled maturities of held-to-maturity investments were as follows:

(in thousands)	September 30, 2016
Due within one year	$	54,863
Due in one to five years	52,908
Total	$	107,771