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Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Accounting Policies [Abstract]        
Loss (gain) on foreign exchange $ 1,648 $ 35 $ 926 $ (212)
Purchases of store real property     $ 42,954 $ 14,986