CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 66,246	$ 44,060	$ 72,331
Adjustments to reconcile net income to net cash provided by operating activities-
Depreciation	23,585	27,967	24,835
Amortization	47,667	48,984	47,966
Amortization of original issue discount	0	0	3,021
Asset impairment	2,061	31,761	1,270
Gain on lease modifications	(4,349)	0	0
(Gain)/loss on short-term investments and other	0	18	(294)
Loss on derivative liability upon debt conversion	0	7,456	0
Loss on extinguishment of debt	0	0	132
Loss on acquisition of controlling interest	0	0	6,180
Unrealized foreign currency transactions (gain)/loss, net	225	(103)	(424)
Deferred income taxes	(23,560)	(27,627)	2,388
Stock-based compensation	28,990	27,243	21,400
Changes in operating assets and liabilities, net of acquired amounts:
Trade accounts receivable, net	(22,401)	(51,005)	(10,278)
Other current and non-current assets and liabilities	(6,566)	(12,833)	(1,527)
Income taxes payable/receivable	(1,849)	9,336	(10,174)
Trade accounts payable and accrued liabilities	12,541	(36,971)	(15,607)
Deferred revenue	9,306	(4,689)	(996)
Net cash provided by operating activities	131,896	63,597	140,223
Cash flows from investing activities:
Purchases of software, property and equipment	(27,977)	(36,991)	(26,562)
Purchases of short-term investments	0	0	(66,970)
Proceeds from sale/maturity of short-term investments	71	27,953	90,452
Acquisition of and investments in business, net of cash acquired	0	0	(63,626)
Net cash used in investing activities	(27,906)	(9,038)	(66,706)
Cash flows from financing activities:
Proceeds from issuance of common stock	3,284	2,969	2,610
Payment of cash dividends	(33,930)	(33,475)	(32,587)
Repurchase of common stock	(127,065)	(96,720)	(42,253)
Deferred acquisition payments	(3,220)	(2,314)	0
Proceeds from long-term debt	470,000	290,000	150,000
Payments on long-term debt	(327,500)	(264,801)	(128,438)
Purchase of capped call transactions related to convertible notes	(34,298)	0	0
Payments of deferred financing costs	(14,539)	0	(3,000)
Settlement and merchant reserve activity	35,963	52,656	20,277
Net cash used in financing activities	(31,305)	(51,685)	(33,391)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	2,173	(5,758)	(2,954)
Net decrease in cash, cash equivalents and restricted cash	74,858	(2,884)	37,172
Cash, cash equivalents and restricted cash, beginning of period	389,018	391,902	354,730
Cash, cash equivalents and restricted cash, end of period	463,876	389,018	391,902
Cash paid during the period for-
Interest	24,730	18,314	12,882
Income taxes	51,675	34,671	36,690
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	186,264	150,365	205,635
Settlement and merchant reserve assets	274,699	238,653	186,267
Restricted cash included in current and non-current assets	2,913	0	0
Total cash, cash equivalents and restricted cash	$ 463,876	$ 389,018	$ 391,902