STOCK-BASED COMPENSATION (Summary of Vested and Unvested Restricted Stock, Performance Stock, and Contract Stock) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Restricted Stock Awards
Shares
Unvested at beginning of year (in shares) | shares	472
Granted (in shares) | shares	242
Cancellations (in shares) | shares	(78)
Released (in shares) | shares	(214)
Vested but not released (in shares) | shares	0
Unvested at end of year (in shares) | shares	422
Weighted Average Grant Date Fair Value Per Share
Unvested at beginning of year (in dollars per share) | $ / shares	$ 50.02
Granted (in dollars per share) | $ / shares	68.31
Cancellations (in dollars per share) | $ / shares	54.94
Released (in dollars per share) | $ / shares	51.63
Vested but not released (in dollars per share) | $ / shares	0
Unvested at end of year (in dollars per share) | $ / shares	$ 58.78
Performance Stock and Contract Stock Awards
Shares
Unvested at beginning of year (in shares) | shares	197
Granted (in shares) | shares	223
Adjustments for performance achievement related to award target (in shares) | shares	96
Cancellations (in shares) | shares	(152)
Released (in shares) | shares	(20)
Vested but not released (in shares) | shares	(289)
Unvested at end of year (in shares) | shares	55
Weighted Average Grant Date Fair Value Per Share
Unvested at beginning of year (in dollars per share) | $ / shares	$ 47.66
Granted (in dollars per share) | $ / shares	67.91
Adjustments for performance achievement related to award target (in dollars per share) | $ / shares	58.18
Cancellations (in dollars per share) | $ / shares	0
Released (in dollars per share) | $ / shares	67.84
Vested but not released (in dollars per share) | $ / shares	58.06
Unvested at end of year (in dollars per share) | $ / shares	$ 70.74