XML 71 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-Term Debt - Summary of Borrowings Outstanding (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Jan. 01, 2017
Line Of Credit Facility [Line Items]    
Total borrowings $ 45,000 $ 10,000
LIBO Rate [Member]    
Line Of Credit Facility [Line Items]    
Total borrowings $ 45,000 $ 10,000