DEBT (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt	$ 762,556	$ 814,139
Long Term Debt Fair Value	763,316	836,654
Long-term Debt, Gross	750,243	800,150
Debt issuance costs, net	(714)	(831)
Unamortized interest rate swap proceeds	13,027	14,820
Less: current portion of long-term debt and short-term debt	243	150
Total long-term debt	762,313	813,989
Long-term Debt, gross [Member]
Debt Instrument [Line Items]
Long Term Debt Fair Value	751,003	822,665
Carrying Value
Debt Instrument [Line Items]
Less: current portion of long-term debt and short-term debt	243	150
Total long-term debt	762,313	813,989
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	225,000
Carrying Value \| 3.85% Senior notes due 2025
Debt Instrument [Line Items]
Long-term Debt	90,000	100,000
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	75,000
Carrying Value \| 4.11% Senior notes due 2028
Debt Instrument [Line Items]
Long-term Debt	90,000	100,000
Carrying Value \| Other debt
Debt Instrument [Line Items]
Long-term Debt	243	150
Estimated Fair Value
Debt Instrument [Line Items]
Less: current portion of long-term debt and short-term debt	243	150
Total long-term debt	763,073	836,504
Estimated Fair Value \| 3.84% Senior notes due 2021
Debt Instrument [Line Items]
Long Term Debt Fair Value	100,359	102,472
Estimated Fair Value \| 3.70% Senior notes due 2023
Debt Instrument [Line Items]
Long Term Debt Fair Value	201,813	228,783
Estimated Fair Value \| 3.85% Senior notes due 2025
Debt Instrument [Line Items]
Long Term Debt Fair Value	89,711	102,164
Estimated Fair Value \| 4.24% Senior notes due 2026
Debt Instrument [Line Items]
Long Term Debt Fair Value	202,288	208,873
Estimated Fair Value \| 4.05% Senior notes due 2028
Debt Instrument [Line Items]
Long Term Debt Fair Value	66,942	76,997
Estimated Fair Value \| 4.11% Senior notes due 2028
Debt Instrument [Line Items]
Long Term Debt Fair Value	89,647	103,226
Estimated Fair Value \| Other debt
Debt Instrument [Line Items]
Long Term Debt Fair Value	$ 243	$ 150

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 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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