CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Cash flows from operating activities:
Net income	$ 104,796	$ 135,897	$ 87,238
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,489	48,588	47,260
Stock-based compensation expense	23,385	21,469	18,958
Impairment of tradenames	106,555
Provision for doubtful accounts	14,260	13,675	12,987
Gain on cash surrender value of life insurance policies	(6,160)	(7,776)	(4,918)
Gain on marketable securities	(8,134)	(10,278)	(10,842)
Deferred income taxes	(27,796)	(6,564)	6,589
Change in other assets and liabilities:
Deferred compensation	18,478	27,660	6,868
Receivables due from clients	(30,625)	(53,357)	(42,326)
Income taxes and other receivables	1,409	2,093	(10,177)
Prepaid expenses and other assets	(148)	(2,118)	(1,796)
Unearned compensation	(7,299)	(42,742)	(17,465)
Investment in unconsolidated subsidiaries	(311)	(297)	(333)
Income taxes payable	213	32,439	205
Accounts payable and accrued liabilities	28,398	66,081	5,420
Other	(4,705)	(5,645)	8,473
Net cash provided by operating activities	258,805	219,125	106,141
Cash flows from investing activities:
Purchase of property and equipment	(46,682)	(42,000)	(50,088)
Purchase of marketable securities	(9,476)	(9,462)	(10,536)
Proceeds from sales/maturities of marketable securities	13,781	2,642	42,815
Cash paid for acquisitions, net of cash acquired			(2,880)
Premium on company-owned life insurance policies	(34,862)	(1,614)	(1,597)
Proceeds from life insurance policies	7,632	5,355	1,117
Dividends received from unconsolidated subsidiaries	140	240	564
Net cash used in investing activities	(69,467)	(44,839)	(20,605)
Cash flows from financing activities:
Proceeds from long term debt	226,875		275,000
Principal payments on term loan	(238,906)	(20,625)	(155,469)
Payment of debt issuance costs	(2,181)
Repurchases of common stock	(37,372)	(33,071)	(28,821)
Payments of tax withholdings on restricted stock	(20,698)	(3,794)	(4,758)
Payment of contingent consideration from acquisitions	(455)	(485)	(1,070)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan	7,272	6,885	5,121
Dividends paid to shareholders	(23,459)	(22,955)	(23,318)
Dividends - noncontrolling interest	(2,255)	(2,659)	(1,203)
Borrowings under life insurance policies	31,870
Payments on life insurance policy loans	(5,316)	(554)	(1,117)
Net cash (used in) provided by financing activities	(64,625)	(77,258)	64,365
Effect of exchange rate changes on cash and cash equivalents	(19,201)	12,938	(12,271)
Net increase in cash and cash equivalents	105,512	109,966	137,630
Cash and cash equivalents at beginning of year	520,848	410,882	273,252
Cash and cash equivalents at end of the period	626,360	520,848	410,882
Supplemental cash flow information:
Cash used to pay interest	14,188	11,946	10,882
Cash used to pay income taxes, net of refunds	$ 58,408	$ 37,486	$ 32,458