CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Cash flows from operating activities:
Net income	$ 47,229	$ 153,151
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	38,566	33,322
Stock-based compensation expense	19,953	17,426
Provision for doubtful accounts	11,787	11,018
Gain on cash surrender value of life insurance policies	(3,947)	(4,890)
Impairment of right-of-use assets	1,629	0
Impairment of fixed assets	1,575	0
Loss on marketable securities	1,024	9,691
Deferred income taxes	1,225	(817)
Change in other assets and liabilities:
Accounts payable and accrued liabilities	(216,582)	(235,729)
Receivables due from clients	(34,394)	(71,747)
Deferred compensation	15,866	18,871
Unearned compensation	(14,807)	(5,785)
Income taxes and other receivables	(7,791)	(12,220)
Prepaid expenses and other assets	(4,522)	(4,209)
Income taxes payable	384	(6,582)
Other	909	(218)
Net cash used in operating activities	(141,896)	(98,718)
Cash flows from investing activities:
Proceeds from sales/maturities of marketable securities	29,731	37,186
Purchase of property and equipment	(31,538)	(36,867)
Purchase of marketable securities	(29,580)	(52,085)
Proceeds from life insurance policies	9,332	1,050
Premium on company-owned life insurance policies	(251)	(289)
Dividends received from unconsolidated subsidiaries	0	150
Cash paid for acquisitions, net of cash acquired	0	(99,322)
Net cash used in investing activities	(22,306)	(150,177)
Cash flows from financing activities:
Dividends paid to shareholders	(19,289)	(16,874)
Payments of tax withholdings on restricted stock	(10,551)	(22,060)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan	4,696	4,371
Repurchases of common stock	(9,527)	(56,891)
Dividends - noncontrolling interest	(3,040)	(3,133)
Principal payments on finance leases	(938)	(814)
Payments on life insurance policy loans	0	(662)
Net cash used in financing activities	(38,649)	(96,063)
Effect of exchange rate changes on cash and cash equivalents	(20,337)	(39,212)
Net decrease in cash and cash equivalents	(223,188)	(384,170)
Cash and cash equivalents at beginning of period	844,024	978,070
Cash and cash equivalents at end of the period	$ 620,836	$ 593,900