Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Marketable Securities [Abstract]

Schedule of Marketable Securities

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

December 31,	2013		2012
U.S. Government and agency obligations	$	10,000	$	7,375
Commercial paper	39,968		34,966
Municipal bonds	—		8,738
Corporate bonds	—		5,009
Total short-term marketable securities	49,968		56,088
U.S. Government and agency obligations	67,234		55,342
Total long-term marketable securities	67,234		55,342
Total marketable securities	$	117,202	$	111,430

Held-to-maturity Securities

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

December 31, 2013
Due within one year	$	49,968
Due in one to five years	67,234
Total	$	117,202