EMPLOYEE COMPENSATION PLANS (EQUITY BASED COMPENSATION EXPENSE TABLE) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense	$ 17,571	$ 16,425	$ 12,507
Total Tax Benefit Recognized for Equity-Based Compensation Expense	5,512	8,673	3,471
Restricted Stock Units (RSUs) [Member] | Cost of Services
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense	7,175	6,099	4,254
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	$ 10,396	$ 10,326	$ 8,253