Short-Term Investments (Tables)

6 Months Ended

Jun. 30, 2013

Short-Term Investments

Available for sale investments

The following summarizes the Company’s available for sale investments at June 30, 2013:

(in thousands)	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Debt securities:
U.S. Treasury	$	26,033	$	1	$	8	$	26,026
Corporate bonds	41,331		45		67		41,309
Total	$	67,364	$	46	$	75	$	67,335
Maturities of investments were as follows:
Less than one year	$	42,597	$	4	$	17	$	42,584
Greater than one year	24,767		42		58		24,751
Total	$	67,364	$	46	$	75	$	67,335

The following summarizes the Company’s available for sale investments at December 31, 2012:

(in thousands)	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Debt securities:
U.S. Treasury	$	29,000	$	8	$	—	$	29,008
Corporate bonds	42,334		10		14		42,330
Total	$	71,334	$	18	$	14	$	71,338
Maturities of investments were as follows:
Less than one year	$	34,553	$	10	$	3	$	34,560
Greater than one year	36,781		8		11		36,778
Total	$	71,334	$	18	$	14	$	71,338