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SHARE-BASED COMPENSATION - Share/Cash Settled Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Weighted  average grant date fair value
Liability for cash-settled restricted stock units	$ 3,796		$ 9,091
Performance Vesting Restricted Stock Units | Share Settled
Number of restricted stock units
Nonvested restricted stock units - beginning of period (in shares)	311
Granted (in shares)	140
Vested (in shares)	(100)
Forfeited (in shares)	0
Nonvested restricted stock units - end of period (in shares)	351
Weighted  average grant date fair value
Nonvested restricted stock units - beginning of period (in usd per share)	$ 54.75
Granted (in usd per share)	68.63
Vested (in usd per share)	54.70
Forfeited (in usd per share)	0
Nonvested restricted stock units - end of period (in usd per share)	$ 60.15
Service Based Restricted Stock Units | Share Settled
Number of restricted stock units
Nonvested restricted stock units - beginning of period (in shares)	2,062
Granted (in shares)	945
Vested (in shares)	(665)
Forfeited (in shares)	(146)
Nonvested restricted stock units - end of period (in shares)	2,196
Weighted  average grant date fair value
Nonvested restricted stock units - beginning of period (in usd per share)	$ 51.59
Granted (in usd per share)	56.01
Vested (in usd per share)	52.66
Forfeited (in usd per share)	52.78
Nonvested restricted stock units - end of period (in usd per share)	$ 53.09
Service Based Restricted Stock Units | Cash Settled
Number of restricted stock units
Nonvested restricted stock units - beginning of period (in shares)	215
Granted (in shares)	0
Vested (in shares)	(139)
Forfeited (in shares)	(7)
Nonvested restricted stock units - end of period (in shares)	69
Restricted Stock Units (RSUs)
Weighted  average grant date fair value
Share-based compensation expense	$ 29,052	$ 25,080
Tax benefits associated with share-based compensation expense	4,956	4,075
Fair value of restricted stock units vested	48,121	41,671
Unrecognized share-based compensation expense	$ 106,007	$ 107,267
Expected weighted average period associated with the recognition of unrecognized share-based compensation expense	2 years 8 months 12 days	2 years 9 months 18 days
Restricted Stock Units (RSUs) | Cash Settled
Weighted  average grant date fair value
Liability for cash-settled restricted stock units	$ 3,796	$ 5,804

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

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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