XML 46 R35.htm IDEA: XBRL DOCUMENT v2.4.0.8
Accounts Receivable - Summary of Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for doubtful accounts $ (737) $ (700)
Accounts receivable, Total 43,446 44,364
Trade Accounts Receivable [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Contract receivables 19,228 18,815
Contract Receivables [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Contract receivables $ 24,955 $ 26,249