SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill	$ 846,704	$ 786,504	$ 717,861
Total assets	2,122,028	2,021,540
Other long-term accrued liabilities	85,911	78,846
Total liabilities	854,831	910,323
Retained earnings	687,069	530,088
Total stockholders' equity	1,267,197	1,111,217	964,651	$ 833,109
Total liabilities and stockholders' equity	2,122,028	2,021,540
Customer Contracts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Intangible assets, net	$ 298,559	301,914
As reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill		721,819
Total assets		1,980,870
Other long-term accrued liabilities		67,345
Total liabilities		898,822
Retained earnings		500,919
Total stockholders' equity		1,082,048	941,360	815,750
Total liabilities and stockholders' equity		1,980,870
As reported | Customer Contracts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Intangible assets, net		325,929
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill		64,685	64,685
Total assets		40,670
Other long-term accrued liabilities		11,501
Total liabilities		11,501
Retained earnings		29,169
Total stockholders' equity		29,169	$ 23,291	$ 17,359
Total liabilities and stockholders' equity		40,670
Adjustment | Customer Contracts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Intangible assets, net		$ (24,015)