STOCK-BASED COMPENSATION (Details - Chairman and Chief Executive Officer Grants) - USD ($)					3 Months Ended
	Feb. 16, 2018	Jan. 02, 2018	Jul. 26, 2017	Jul. 25, 2017	Mar. 31, 2018	Mar. 31, 2017	May 24, 2017
STOCK-BASED COMPENSATION
Target grant date value of performance based equity compensation	$ 7,500,000			$ 87,500,000
Percentage, Target grant date value of performance based equity compensation, Restricted stock awards	50.00%			25.00%
Percentage, Target grant date value of performance based equity compensation, Nonqualified stock options	50.00%			75.00%
Targeted total shareholder return performance, Nonqualified stock options	81.00%			110.00%
Granted (in shares)	13,163	58,010	402,694
Granted (in dollars per share)	$ 378.95	$ 340.25	$ 183.80
Annaul grant limit per employee (in shares)					672,500
Total non-cash compensation					$ 11,109,000	$ 2,230,000
Stock options, Shares
Granted (in shares)	13,163	58,010	402,694
Stock options, Weighted Average Exercise Price
Granted (in dollars per share)	$ 378.95	$ 340.25	$ 183.80
Stock options, Grant Date Fair Value Valuation
Share price					$ 328.15		$ 156.70
Grant date fair value					$ 183.26
Maximum
STOCK-BASED COMPENSATION
Targeted total shareholder return performance, Nonqualified stock options	167.00%			167.00%
Granted (in shares)	21,982		672,499
Stock options, Shares
Granted (in shares)	21,982		672,499
Minimum
STOCK-BASED COMPENSATION
Targeted total shareholder return performance, Nonqualified stock options	41.00%			70.00%
Performance Shares
STOCK-BASED COMPENSATION
Granted (in shares)				119,015	0
Maximum potential future issuance of performance based equity compensation, Nonqualified stock options				769,376
Granted (in shares)		26,674
Granted (in dollars per share)		$ 21,900,000	$ 1,900,000		$ 0.00
Performance awards earned						19,175
Stock options, Shares
Granted (in shares)		26,674
Forfeited (in shares)					(2,055)
Performance options
STOCK-BASED COMPENSATION
Granted (in shares)	21,982	31,336			44,499
Granted (in dollars per share)					$ 351.70
Granted (in dollars per share)			$ 9,500,000
Performance awards earned						312,008
Stock options, Shares
Outstanding at the beginning of the period (in shares)					402,694
Granted (in shares)	21,982	31,336			44,499
Exercised (in shares)					0
Forfeited (in shares)					0
Expired (in shares)					0
Outstanding at the end of the period (in shares)					447,193
Options exercisable at the end of the period (in shares)					0
Stock options, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)					$ 183.80
Granted (in dollars per share)					351.70
Exercised (in dollars per share)					0.00
Forfeited (in dollars per share)					0.00
Expired (in dollars per share)					0.00
Outstanding at the end of the period (in dollars per share)					200.51
Options exercisable at the end of the period (in dollars per share)					$ 0.00
Stock options, Weighted Average Remaining Contractual Term
Outstanding at the end of the period					9 years 4 months 15 days
Options exercisable at the end of the period					0 years
Stock options, Aggregate Intrinsic Value
Outstanding at the end of the period					$ 58,129,000
Options exercisable at the end of the period					$ 0
Stock options, Grant Date Fair Value Valuation
Grant date fair value					$ 296.80
Expected dividend rate					0.00%
Expected volatility					50.00%
Risk-free interest rate, minimum					2.38%
Risk-free interest rate, maximum					2.81%
Expected dividends					$ 0
Performance options | Maximum
Stock options, Grant Date Fair Value Valuation
Expected term					P7Y1M24D
Performance options | Minimum
Stock options, Grant Date Fair Value Valuation
Expected term					P7Y
Restricted Stock Units (RSUs)
STOCK-BASED COMPENSATION
Granted (in shares)	9,896				36,948
Granted (in dollars per share)	$ 378.95				$ 364.34
Stock options, Shares
Forfeited (in shares)					(840)
Chairman And Chief Executive Officer [Member]
STOCK-BASED COMPENSATION
Total non-cash compensation					$ 5,300,000