DEBT AND CREDIT AGREEMENTS (Long-term Debt) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Aug. 31, 2021	May 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 2,159,000			$ 2,084,000
Less Unamortized Discount and Debt Issuance Costs	24,000			20,000
Current Maturities of Long-Term Debt	0			250,000
Total Long-Term Debt, Net	$ 2,134,534			1,814,059
2011 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.15%	5.15%
Long-term debt	$ 0			250,000
2012 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.85%
Long-term debt	$ 150,000			150,000
2014 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.00%
Long-term debt	$ 150,000			150,000
2015 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.05%
Long-term debt	$ 300,000			300,000
2018 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.85%
Long-term debt	$ 300,000			300,000
2020 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.00%
Long-term debt	$ 350,000			350,000
2020 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	1.50%
Long-term debt	$ 300,000			300,000
2021 Senior Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.25%		3.25%
Long-term debt	$ 325,000			0
2012 Pima A | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.50%
Long-term debt	$ 16,000			16,000
2013 Pima A | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.00%
Long-term debt	$ 91,000			91,000
2012 Apache A | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.50%
Long-term debt	$ 177,000			$ 177,000