FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Categorized by Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Level 1
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Cash and cash equivalents	$ 151,589	$ 130,503
Accounts receivable, net	0	0
Agent advances, net of allowance	0	0
Prepaid wires	0	0
Total assets	151,589	130,503
Accounts payable	0	0
Wire transfers and money orders payable	0	0
Total liabilities	0	0
Level 1 | Revolving credit facility | Line of Credit
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Revolving credit facility	0	0
Level 2
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Cash and cash equivalents	0	0
Accounts receivable, net	119,218	107,077
Agent advances, net of allowance	4,261	4,285
Prepaid wires	23,199	49,205
Total assets	146,678	160,567
Accounts payable	18,328	19,520
Wire transfers and money orders payable	93,416	85,044
Total liabilities	269,658	261,164
Level 2 | Revolving credit facility | Line of Credit
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Revolving credit facility	157,914	156,600
Level 3
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Agent advances, net of allowance	0	0
Prepaid wires	0	0
Total assets	0	0
Accounts payable	0	0
Wire transfers and money orders payable	0	0
Total liabilities	0	0
Level 3 | Revolving credit facility | Line of Credit
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Revolving credit facility	$ 0	$ 0