Annual report pursuant to Section 13 and 15(d)

Consolidated Valuation and Qualifying Accounts and Reserves (Detail)

v3.3.1.900
Consolidated Valuation and Qualifying Accounts and Reserves (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance for doubtful accounts      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 1,711 $ 573 $ 304
Charges (Reversals) to Cost or Expenses 86 1,261 291
Deductions (32) (123) (22)
Balance at End of Year 1,765 1,711 573
Allowance for sales returns      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 110 110 110
Charges (Reversals) to Cost or Expenses 100    
Balance at End of Year 210 110 110
Allowance for tax valuation      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 42,069 35,566 33,341
Charges (Reversals) to Cost or Expenses 7,445 6,503 2,225
Balance at End of Year $ 49,514 $ 42,069 $ 35,566