SIGNIFICANT ACCOUNTING POLICIES (Details - PP&E & Advertising) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Advertising
Advertising Expense	$ 410.8	$ 243.2	$ 159.2
Building
Property and Equipment
Depreciation period	34 years
Site improvements | Minimum
Property and Equipment
Depreciation period	1 year
Site improvements | Maximum
Property and Equipment
Depreciation period	15 years
Computer equipment and capitalized software | Minimum
Property and Equipment
Depreciation period	1 year
Computer equipment and capitalized software | Maximum
Property and Equipment
Depreciation period	5 years
Furniture and other equipment | Minimum
Property and Equipment
Depreciation period	3 years
Furniture and other equipment | Maximum
Property and Equipment
Depreciation period	7 years
Software development | Minimum
Property and Equipment
Depreciation period	1 year
Software development | Maximum
Property and Equipment
Depreciation period	3 years
Aircraft and automobile | Minimum
Property and Equipment
Depreciation period	5 years
Aircraft and automobile | Maximum
Property and Equipment
Depreciation period	10 years