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DERIVATIVE INSTRUMENTS (Schedule of Cross-Currency Swap Derivatives) (Details) SFr in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2020 CHF (SFr)	Dec. 21, 2020 USD ($)	Dec. 21, 2020 CHF (SFr)	Oct. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CHF (SFr)	Oct. 02, 2017 USD ($)	Oct. 02, 2017 CHF (SFr)
Cross-Currency Interest Rate Swap
Derivative [Line Items]
Aggregate Notional Amount			$ 471,600,000	SFr 420,100
Cross-Currency Interest Rate Swap | Long
Derivative [Line Items]
Aggregate Notional Amount | SFr									SFr 291,200
Cross-Currency Interest Rate Swap | Short
Derivative [Line Items]
Aggregate Notional Amount								$ 300,000,000.0
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Aggregate Notional Amount	$ 1,875,000,000					$ 1,325,000,000
Fair Value (Liability)	(93,769,000)					(45,145,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap
Derivative [Line Items]
Aggregate Notional Amount					$ 33,300,000	66,700,000
Fair Value (Liability)	(23,441,000)					(509,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Swap One
Derivative [Line Items]
Fair Value (Liability)						(101,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Swap Two
Derivative [Line Items]
Fair Value (Liability)	(4,335,000)					(119,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Swap Three
Derivative [Line Items]
Fair Value (Liability)	(11,262,000)					$ (289,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Swap, Four
Derivative [Line Items]
Fair Value (Liability)	$ (7,843,000)
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Long | Swap One
Derivative [Line Items]
Fixed Rate						1.75%	1.75%
Aggregate Notional Amount | SFr							SFr 32,355
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Long | Swap Two
Derivative [Line Items]
Fixed Rate	1.85%	1.85%				1.85%	1.85%
Aggregate Notional Amount | SFr		SFr 48,533					SFr 48,533
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Long | Swap Three
Derivative [Line Items]
Fixed Rate	1.95%	1.95%				1.95%	1.95%
Aggregate Notional Amount | SFr		SFr 145,598					SFr 145,598
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Long | Swap, Four
Derivative [Line Items]
Fixed Rate	3.00%	3.00%
Aggregate Notional Amount | SFr		SFr 420,137
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Short | Swap One
Derivative [Line Items]
Fixed Rate						4.38%	4.38%
Aggregate Notional Amount						$ 33,333,000
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Short | Swap Two
Derivative [Line Items]
Fixed Rate	4.46%	4.46%				4.46%	4.46%
Aggregate Notional Amount	$ 50,000,000					$ 50,000,000
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Short | Swap Three
Derivative [Line Items]
Fixed Rate	4.52%	4.52%				4.52%	4.52%
Aggregate Notional Amount	$ 150,000,000					$ 150,000,000
Cash Flow Hedging | Designated as Hedging Instrument | Cross-Currency Interest Rate Swap | Short | Swap, Four
Derivative [Line Items]
Fixed Rate	3.98%	3.98%
Aggregate Notional Amount	$ 471,640,000

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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