DERIVATIVES - Net Gains (Losses) Relating to the Cash Flow Derivative Instruments (Details) - Derivative designated as a cash flow hedge - Interest rate swaps - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Net gains (losses) recorded in accumulated other comprehensive income and the Consolidated Statements of Income
Interest rate contracts, Amount of (loss) gain recognized in OCI included component	$ (9,510)	$ (1,597)
Interest rate contracts, Amount of gain (loss) reclassified from Accumulated OCI into income included component	$ 110	$ 556

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
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Amount before tax of reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section 45
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