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INCOME TAXES (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current provision:      
U.S. Federal $ 248,090 $ 310,582 $ 412,545
U.S. State 28,693 38,249 49,894
Foreign 22,057 25,076 24,087
Total current 298,840 373,907 486,526
Deferred tax provision (benefit) 14,041 12,313 (20,995)
Income tax expense 312,881 $ 386,220 $ 465,531
Operating loss carryforwards related primarily from foreign operations $ 285,000    
Reduction to the overall effective tax rate from income tax credits (as a percent) 4.00% 2.80% 1.00%
Net provisional benefit primarily related to deferred tax balances revaluations and one-time transition tax $ 3,200    
Net provisional benefit from remeasurement of deferred tax assets and liabilities 5,200    
One-time transition tax and recognized net provisional expense 2,000    
Estimated tax obligation 47,000    
Previously deferred U.S. income taxes 472,000    
Estimated foreign tax credits 45,000    
Undistributed earnings of foreign subsidiaries 472,000    
Accrued interest and penalties related to tax uncertainties 5,000 $ 4,000 $ 5,000
Liability for tax uncertainties 21,000 22,000  
Interest expense $ 1,000 $ 1,000 $ 1,000