Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Marketable Securities - Marketable Securities with Unrealized Losses (Detail)

v2.4.0.8
Fair Value Measurements and Marketable Securities - Marketable Securities with Unrealized Losses (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Schedule Of Available For Sale Securities [Line Items]  
Marketable securities, in loss position for less than twelve months, Fair Value $ 20,269
Marketable securities, in loss position for less than twelve months, Unrealized Loss (6)
U. S. Government Securities
 
Schedule Of Available For Sale Securities [Line Items]  
Marketable securities, in loss position for less than twelve months, Fair Value 8,010
Marketable securities, in loss position for less than twelve months, Unrealized Loss (1)
Corporate Debt Securities
 
Schedule Of Available For Sale Securities [Line Items]  
Marketable securities, in loss position for less than twelve months, Fair Value 12,259
Marketable securities, in loss position for less than twelve months, Unrealized Loss $ (5)