CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Cash flows from operating activities:
Net income	$ 48,811	$ 107,638
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,068	40,355
Stock-based compensation expense	20,210	16,988
Write-off of long-lived assets		2,654
Provision for doubtful accounts	11,561	10,958
Gain on cash surrender value of life insurance policies	(8,575)	(5,794)
Gain on marketable securities	(27,176)	(8,341)
Deferred income taxes	(3,061)	(1,974)
Change in other assets and liabilities:
Deferred compensation	45,224	26,646
Receivables due from clients	(62,844)	(37,258)
Income taxes and other receivables	(83)	(6,424)
Prepaid expenses and other assets	(1,891)	(9,191)
Unearned compensation	(35,211)	(17,393)
Income taxes payable	(13,122)	(1,444)
Accounts payable and accrued liabilities	22,559	(59,911)
Other	11,835	(372)
Net cash provided by operating activities	54,305	57,137
Cash flows from investing activities:
Purchase of property and equipment	(22,842)	(33,753)
Purchase of marketable securities	(55,057)	(39,081)
Proceeds from sales/maturities of marketable securities	53,393	3,245
Cash paid for acquisitions, net of cash acquired		(108,602)
Premium on company-owned life insurance policies	(14,366)	(15,448)
Proceeds from life insurance policies	8,366	2,280
Dividends received from unconsolidated subsidiaries	205	286
Net cash used in investing activities	(30,301)	(191,073)
Cash flows from financing activities:
Repurchases of common stock	(30,387)	(68,055)
Dividends paid to shareholders	(16,954)	(17,292)
Payments on life insurance policy loans	(7,877)	(943)
Payments of tax withholdings on restricted stock	(4,712)	(8,862)
Principal payments on finance leases	(1,024)	(1,426)
Dividends paid to noncontrolling interest	(558)	(2,110)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan	5,706	7,684
Proceeds from long term debt		445,500
Principal payments on long term debt		(276,875)
Payment of debt issuance costs		(3,050)
Payment of contingent consideration from acquisitions		(455)
Net cash (used in) provided by financing activities	(55,806)	74,116
Effect of exchange rate changes on cash and cash equivalents	36,686	(2,832)
Net increase (decrease) in cash and cash equivalents	4,884	(62,652)
Cash and cash equivalents at beginning of period	689,244	626,360
Cash and cash equivalents at end of the period	$ 694,128	$ 563,708