Segment Information - Reportable Segments and Reconciliation to Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Revenues	$ 239,812	$ 219,867	$ 464,442	$ 425,586
Cost of services (excludes depreciation and amortization)	(147,399)	(138,118)	(284,752)	(267,416)
Adjusted EBITDA	77,077	67,371	148,741	128,867
SMB Payments
Segment Reporting Information [Line Items]
Revenues	162,788	154,769	314,029	298,516
Other operating expenses	(8,367)	(7,498)	(16,580)	(14,714)
Other segment items	700	460	1,500	814
Adjusted EBITDA	27,749	28,597	53,454	53,620
B2B Payments
Segment Reporting Information [Line Items]
Revenues	24,668	21,614	48,356	42,729
Other operating expenses	(3,606)	(4,144)	(7,534)	(8,706)
Other segment items	94	109	245	226
Adjusted EBITDA	3,770	1,530	7,286	3,276
Enterprise Payments
Segment Reporting Information [Line Items]
Revenues	52,356	43,484	102,057	84,341
Other operating expenses	(4,457)	(3,530)	(9,066)	(7,266)
Other segment items	296	222	481	338
Adjusted EBITDA	45,558	37,244	88,001	71,971
Operating Segments
Segment Reporting Information [Line Items]
Revenues	240,921	220,652	466,617	426,990
Operating Segments \| SMB Payments
Segment Reporting Information [Line Items]
Revenues	163,230	155,101	314,920	299,105
Cost of services (excludes depreciation and amortization)	(127,814)	(119,466)	(246,386)	(231,585)
Operating Segments \| B2B Payments
Segment Reporting Information [Line Items]
Revenues	25,033	21,881	48,951	43,225
Cost of services (excludes depreciation and amortization)	(17,751)	(16,316)	(34,376)	(31,469)
Operating Segments \| Enterprise Payments
Segment Reporting Information [Line Items]
Revenues	52,658	43,670	102,746	84,660
Cost of services (excludes depreciation and amortization)	(2,939)	(3,118)	(6,160)	(5,761)
Eliminations
Segment Reporting Information [Line Items]
Revenues	(1,109)	(785)	(2,175)	(1,404)
Cost of services (excludes depreciation and amortization)	(1,105)	(783)	(2,170)	(1,400)
Eliminations \| SMB Payments
Segment Reporting Information [Line Items]
Revenues	(442)	(332)	(891)	(589)
Eliminations \| B2B Payments
Segment Reporting Information [Line Items]
Revenues	(365)	(267)	(595)	(496)
Eliminations \| Enterprise Payments
Segment Reporting Information [Line Items]
Revenues	$ (302)	$ (186)	$ (689)	$ (319)