DEBT (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt	$ 760,639	$ 762,556
Long Term Debt Fair Value	794,431	763,316
Long-term Debt, Gross	750,000	750,243
Debt issuance costs, net	(594)	(714)
Unamortized interest rate swap proceeds (1)	11,233	13,027
Less: current portion of long-term debt and short-term debt	0	243
Total long-term debt	760,639	762,313
Long-term Debt, gross [Member]
Debt Instrument [Line Items]
Long Term Debt Fair Value	783,792	751,003
Carrying Value
Debt Instrument [Line Items]
Less: current portion of long-term debt and short-term debt	0	243
Total long-term debt	760,639	762,313
Carrying Value \| 3.84% Senior notes due 2021
Debt Instrument [Line Items]
Long-term Debt	100,000	100,000
Carrying Value \| 3.70% Senior notes due 2023
Debt Instrument [Line Items]
Long-term Debt	202,500	202,500
Carrying Value \| 3.85% Senior notes due 2025
Debt Instrument [Line Items]
Long-term Debt	90,000	90,000
Carrying Value \| 4.24% Senior notes due 2026
Debt Instrument [Line Items]
Long-term Debt	200,000	200,000
Carrying Value \| 4.05% Senior notes due 2028
Debt Instrument [Line Items]
Long-term Debt	67,500	67,500
Carrying Value \| 4.11% Senior notes due 2028
Debt Instrument [Line Items]
Long-term Debt	90,000	90,000
Carrying Value \| Other debt
Debt Instrument [Line Items]
Long-term Debt	0	243
Estimated Fair Value
Debt Instrument [Line Items]
Less: current portion of long-term debt and short-term debt	0	243
Total long-term debt	794,431	763,073
Estimated Fair Value \| 3.84% Senior notes due 2021
Debt Instrument [Line Items]
Long Term Debt Fair Value	102,079	100,359
Estimated Fair Value \| 3.70% Senior notes due 2023
Debt Instrument [Line Items]
Long Term Debt Fair Value	207,882	201,813
Estimated Fair Value \| 3.85% Senior notes due 2025
Debt Instrument [Line Items]
Long Term Debt Fair Value	93,838	89,711
Estimated Fair Value \| 4.24% Senior notes due 2026
Debt Instrument [Line Items]
Long Term Debt Fair Value	213,126	202,288
Estimated Fair Value \| 4.05% Senior notes due 2028
Debt Instrument [Line Items]
Long Term Debt Fair Value	71,260	66,942
Estimated Fair Value \| 4.11% Senior notes due 2028
Debt Instrument [Line Items]
Long Term Debt Fair Value	95,607	89,647
Estimated Fair Value \| Other debt
Debt Instrument [Line Items]
Long Term Debt Fair Value	$ 0	$ 243

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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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 as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective interest rate fair value hedge that is amortized upon discontinuation of the interest rate fair value hedge.

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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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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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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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