Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Receivables [Abstract]      
Beginning balance – allowance for doubtful accounts $ 4,180 $ 4,540 $ 3,002
Provision for doubtful accounts 2,318 2,437 2,797
Write-offs (1,739) (2,797) (1,259)
Ending balance – allowance for doubtful accounts $ 4,759 $ 4,180 $ 4,540