XML 53 R39.htm IDEA: XBRL DOCUMENT v3.8.0.1
Nature of Operations and Summary of Significant Accounting Policies - Revenue from Contract with Customers (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 30, 2017
Revenue from Contract with Customer [Abstract]    
Accounts receivable, net $ 91,529 $ 89,624
Contract assets 2,375 2,374
Contract liabilities $ (47,759) $ (38,702)