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Organization and Significant Accounting Policies - Activity in Deferred Revenue Reserve (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Movement in Deferred Revenue [Roll Forward]  
Balance at beginning of year $ 0
Additions to deferred revenue through acquisitions 7,944
New contracts sold 20,569
Less: reductions for revenue recognized (2,356)
Balance at end of year 26,157
Deferred revenue, current 11,012
Deferred revenue, noncurrent $ 15,145