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Legal Proceedings (Details) - Liability for Uncollected Sales Taxes, with Interest and Penalties - Georgia Department of Revenue - USD ($)
$ in Millions
May 22, 2017
Aug. 04, 2015
Jun. 22, 2015
Jun. 05, 2015
Jun. 30, 2011
Loss Contingencies [Line Items]          
Assessed sales tax liability   $ 96.1 $ 100.0 $ 2.7 $ 73.8
Subsequent Event [Member]          
Loss Contingencies [Line Items]          
Assessed sales tax liability $ 2.6