SHARE-BASED COMPENSATION PLANS - Share-Based Compensation Expense and Income Tax Benefits Recognized During the Periods (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 12,617	$ 7,539	$ 23,294	$ 10,630
Income tax benefit	(1,981)	(1,307)	(3,513)	(1,485)
Share-based compensation expense, net of tax	10,636	6,232	19,781	9,145
Stock option and stock purchase plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	636	1,052	1,637	2,409
Unvested stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 11,981	$ 6,487	$ 21,657	$ 8,221

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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