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)

v3.6.0.2
Summary of Significant Accounting Policies - Summary of Changes in Allowance for Doubtful Accounts (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]      
Beginning balance – allowance for doubtful accounts $ 4,759 $ 4,180 $ 4,540
Provision for doubtful accounts 11,856 2,318 2,437
Write-offs (2,916) (1,739) (2,797)
Ending balance – allowance for doubtful accounts $ 13,699 $ 4,759 $ 4,180