Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Consolidated Financial Statements and Accounting Policies - Additional Information (Detail)

v2.4.0.8
Unaudited Condensed Consolidated Financial Statements and Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Sep. 30, 2013
Unaudited Condensed Consolidated Financial Statements And Accounting Policies [Line Items]      
Bad debt expense $ 1,800 $ 1,800 $ 1,284