XML 47 R36.htm IDEA: XBRL DOCUMENT v3.19.2
Summary of Significant Accounting Policies Summary of Significant Accounting Policies:Vendor Rebates and Allowances (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Vendor Rebates and Allowances $ 6.1 $ 9.7