XML 46 R35.htm IDEA: XBRL DOCUMENT v2.4.0.8
Allowance for Doubtful Accounts and Unbilled Services - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Provisions for Doubtful Accounts [Line Items]    
Provision for doubtful accounts $ 4,442 $ 4,094