EMPLOYEE COMPENSATION PLANS (EQUITY BASED COMPENSATION EXPENSE TABLE) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense	$ 22,071	$ 17,571	$ 16,425
Total Tax Benefit Recognized for Equity-Based Compensation Expense	2,329	5,512	8,673
Restricted Stock Units (RSUs) [Member] | Cost of Services
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense	9,766	7,175	6,099
Restricted Stock Units (RSUs) [Member] | Selling General And Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense	$ 12,305	$ 10,396	$ 10,326