CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Cash flows from operating activities:
Net income	$ 14,533	$ 11,417
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	6,770	5,944
Stock-based compensation expense	3,319	2,960
Provision for doubtful accounts	1,911	1,442
Gain on cash surrender value of life insurance policies	(3,263)	(1,291)
Gain on marketable securities	(2,018)	(1,941)
Deferred income taxes	4,859	3,356
Change in other assets and liabilities:
Deferred compensation	1,715	1,436
Receivables due from clients	(28,312)	(22,111)
Income tax and other receivables	152	2,481
Prepaid expenses and other assets	(2,909)	(3,977)
Investment in unconsolidated subsidiaries	(466)	(465)
Income taxes payable	(4,967)	2,014
Accounts payable and accrued liabilities	(77,636)	(62,800)
Other	(3,735)	(5,794)
Net cash used in operating activities	(90,047)	(67,329)
Cash flows from investing activities:
Purchase of property and equipment	(6,590)	(5,183)
Purchase of marketable securities	(4,319)	(20,662)
Proceeds from sales/maturities of marketable securities	7,812	34,179
Change in restricted cash		2,861
Payment of contingent consideration from acquisition		(15,000)
Premiums on company-owned life insurance policies	(419)	(419)
Proceeds from life insurance policies	1,801
Dividends received from unconsolidated subsidiaries	318	510
Net cash used in investing activities	(1,397)	(3,714)
Cash flows from financing activities:
Purchase of common stock	(3,731)	(1,945)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan	1,479	1,822
Tax benefit from exercise of stock options	1,165	97
Payments on life insurance policy loans	(705)
Net cash used in financing activities	(1,792)	(26)
Effect of exchange rate changes on cash and cash equivalents	(1,908)	(2,571)
Net decrease in cash and cash equivalents	(95,144)	(73,640)
Cash and cash equivalents at beginning of period	333,717	224,066
Cash and cash equivalents at end of period	$ 238,573	$ 150,426