Quarterly report pursuant to Section 13 or 15(d)

Additional Cash Flow Information - Reconciliation of Cash, Cash Equivalents And Restricted Cash (Detail)

v3.7.0.1
Additional Cash Flow Information - Reconciliation of Cash, Cash Equivalents And Restricted Cash (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Cash and Cash Equivalents [Abstract]      
Cash and cash equivalents $ 160,726 $ 21,398 $ 12,391
Restricted cash, current 100    
Non-current restricted cash 375    
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows $ 161,201 $ 21,398 $ 12,391