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Accounts Receivable, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2017
Accounts receivable $ 189,569 $ 188,774 $ 193,929
Less: Allowance for doubtful accounts 0 0 (1,395)
Less: Loss allowance (290) 0 0
Accounts receivable, net $ 189,279 $ 188,774 $ 192,534