DEBT (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term Debt	$ 1,050,610	$ 1,058,292
Long Term Debt Fair Value	1,104,707	1,131,414
Long-term Debt, Gross	1,043,900	1,050,000
Debt issuance costs, net	(949)	(1,147)
Unamortized interest rate swap proceeds (1)	7,659	9,439
Less: current portion of long-term debt	0	100,000
Long-term debt	1,050,610	958,292
Carrying Value
Debt Instrument [Line Items]
Less: current portion of long-term debt	0	100,000
Long-term debt	1,050,610	958,292
Estimated Fair Value
Debt Instrument [Line Items]
Less: current portion of long-term debt	0	100,000
Long-term debt	1,104,707	1,031,414
3.84% Senior notes due 2021 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	0	100,000
3.84% Senior notes due 2021 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	0	102,173
3.70% Senior notes due 2023 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	202,500	202,500
3.70% Senior notes due 2023 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	208,086	211,790
3.85% Senior notes due 2025 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	90,000	90,000
3.85% Senior notes due 2025 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	95,246	97,429
4.24% Senior notes due 2026 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	200,000	200,000
4.24% Senior notes due 2026 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	218,421	224,390
4.05% Senior notes due 2028 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	67,500	67,500
4.05% Senior notes due 2028 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	73,783	75,440
4.11% Senior notes due 2028 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	90,000	90,000
4.11% Senior notes due 2028 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	98,854	101,047
3.10% Senior Notes due 2030 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	150,000	150,000
3.10% Senior Notes due 2030 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	154,832	155,805
3.20% Senior Notes due 2032 \| Carrying Value
Debt Instrument [Line Items]
Long-term Debt	150,000	150,000
3.20% Senior Notes due 2032 \| Estimated Fair Value
Debt Instrument [Line Items]
Long Term Debt Fair Value	154,875	155,048
Long-term Debt, gross [Member]
Debt Instrument [Line Items]
Long Term Debt Fair Value	1,097,997	$ 1,123,122
Revolving credit facility
Debt Instrument [Line Items]
Long-term Debt	93,900
Long Term Debt Fair Value	$ 93,900

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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