CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (30,855)	$ 43,650
Adjustments to reconcile net (loss) income to net cash used by operating activities:
Depreciation and amortization	15,035	12,777
Stock-based compensation expense	5,965	5,462
Provision for doubtful accounts	4,626	3,549
Gain on cash surrender value of life insurance policies	(2,105)	(2,338)
Gain on marketable securities	(11,550)	(1,945)
Deferred income taxes	4,072	1,974
Change in other assets and liabilities:
Deferred compensation	19,332	11,652
Receivables due from clients	17,382	(31,450)
Income taxes and other receivables	(2,889)	(3,176)
Prepaid expenses and other assets	(8,134)	(9,845)
Unearned compensation	(24,317)	(14,818)
Income taxes payable	(11,409)	(1,911)
Accounts payable and accrued liabilities	(123,781)	(175,709)
Other	4,366	209
Net cash used in operating activities	(144,262)	(161,919)
Cash flows from investing activities:
Purchase of property and equipment	(8,787)	(10,706)
Purchase of marketable securities	(19,216)	(1,600)
Proceeds from sales/maturities of marketable securities	14,549	1,599
Premium on company-owned life insurance policies	(347)	(341)
Proceeds from life insurance policies	591	1,673
Dividends received from unconsolidated subsidiaries		166
Net cash used in investing activities	(13,210)	(9,209)
Cash flows from financing activities:
Payments of tax withholdings on restricted stock	(4,442)	(8,591)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan	3,371	4,313
Payments on life insurance policy loans	(596)	(943)
Principal payments on finance leases	(331)	(432)
Dividends paid to shareholders	(5,807)	(6,081)
Repurchases of common stock		(12,738)
Payment of contingent consideration from acquisitions		(455)
Net cash used in financing activities	(7,805)	(24,927)
Effect of exchange rate changes on cash and cash equivalents	18,819	(5,668)
Net decrease in cash and cash equivalents	(146,458)	(201,723)
Cash and cash equivalents at beginning of period	689,244	626,360
Cash and cash equivalents at end of the period	$ 542,786	$ 424,637