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Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2017
Cash, demand deposits and checking accounts $ 98,400 $ 115,464 $ 171,397
Time deposits with less than three months maturity date 8,037 22,559 13,055
Cash and cash equivalents $ 106,437 $ 138,023 $ 184,452