Fair value of all liability derivatives designated as cash flow hedging instruments.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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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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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net after-tax gain (loss) included in accumulated other comprehensive earnings	$ 230	$ (147)	$ 1,039	$ 603
Cross Currency Swap Contract \| Derivatives in Cash Flow Hedging Relationships
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount hedged					$ 280,000
Net after-tax gain (loss) included in accumulated other comprehensive earnings			(300)
Cash flow hedge derivative instrument liability at fair value	700		700
Interest Rate Swap \| Derivatives in Cash Flow Hedging Relationships
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) expected to be recognized in earnings in next twelve months related to cross currency swap contract	$ 8		$ 8
Notes payable
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Proceeds from debt					$ 280,000
Interest rate on notes (as a percent)	1.36%		1.36%		1.36%