CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 51,331	$ 36,178
Adjustments to reconcile net income to net cash provided by/(used for) operating activities:
Depreciation and amortization expense	13,408	13,669
Stock-based compensation expense	14,407	11,224
Amortization of operating lease right-of-use assets	4,883	6,043
Unrealized loss/(gain) on investments	8,186	(384)
Unrealized foreign currency exchange loss/(gain), net	2,814	(3,165)
Deferred income tax benefit	(9,444)	(193)
Allowance for expected credit losses	342	34
Others, net	1,160	705
Change in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(30,896)	(45,659)
Other current assets	(6,046)	(1,116)
Income taxes payable, net	7,883	6,185
Other assets	(4,172)	(2,924)
Accounts payable	(4,445)	(808)
Deferred revenue	2,451	3,707
Accrued employee costs	(57,315)	(60,008)
Accrued expenses and other liabilities	26,931	15,647
Operating lease liabilities	(5,453)	(6,005)
Net cash provided by/(used for) operating activities	16,025	(26,870)
Cash flows from investing activities:
Purchases of property and equipment	(12,479)	(16,101)
Proceeds from sale of property and equipment	565	63
Business acquisition (net of cash and cash equivalents acquired)	0	(1,367)
Purchases of investments	(51,495)	(36,804)
Proceeds from redemption of investments	106,750	49,515
Net cash provided by/(used for) investing activities	43,341	(4,694)
Cash flows from financing activities:
Principal payments of finance lease liabilities	(43)	(39)
Proceeds from borrowings	50,000	35,000
Repayments of borrowings	(100,000)	0
Acquisition of treasury stock	(42,363)	(31,385)
Proceeds from ESPP contribution	1,102	0
Net cash (used for)/provided by financing activities	(91,304)	3,576
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,282	(753)
Net decrease in cash, cash equivalents and restricted cash	(30,656)	(28,741)
Cash, cash equivalents and restricted cash at the beginning of the period	125,621	143,810
Cash, cash equivalents and restricted cash at the end of the period	94,965	115,069
Cash paid during the period for:
Interest	3,325	1,277
Income taxes, net of refunds	6,525	5,404
Supplemental disclosure of non-cash investing and financing activities:
Assets acquired under finance lease	$ 99	$ 50