SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revision of Prior Period Financial Statements) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retirement and deferred compensation plan liabilities	$ (22,331)	$ (15,141)
Net Cash Provided by Operations	148,922	84,216
Proceeds from stock option exercises	60,484	38,947
Net Cash (Used) Provided by Financing Activities	$ (216,376)	16,496
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retirement and deferred compensation plan liabilities		(13,296)
Net Cash Provided by Operations		86,061
Proceeds from stock option exercises		37,102
Net Cash (Used) Provided by Financing Activities		14,651
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retirement and deferred compensation plan liabilities		(1,845)
Net Cash Provided by Operations		(1,845)
Proceeds from stock option exercises		1,845
Net Cash (Used) Provided by Financing Activities		$ 1,845