Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Available-For-Sale Securities (Details 4)

v2.4.0.8
Cash, Cash Equivalents and Available-For-Sale Securities (Details 4) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
item
Fair value and gross unrealized losses of investments in individual securities in unrealized loss position  
Weighted-average time to maturity of cash equivalents and available-for-sale securities 187 days
Stated maturity period may be greater than this period and classified as current 1 year
Number of investments in continuous unrealized loss position for more than twelve months 0
Number of individual securities in unrealized loss position for twelve months or less 21
Other-than-temporary impairments of securities $ 0
Fair Value 42,093
Unrealized Losses (26)
U S Government Sponsored Enterprises Debt Securities [Member]
 
Fair value and gross unrealized losses of investments in individual securities in unrealized loss position  
Fair Value 14,804
Unrealized Losses (8)
Corporate Bond Securities And Commercial Paper [Member]
 
Fair value and gross unrealized losses of investments in individual securities in unrealized loss position  
Fair Value 27,289
Unrealized Losses $ (18)