CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Assets
Cash and cash equivalents	$ 380,373	$ 285,746
Restricted cash	373	369
Investment securities	135,389	125,258
Accounts receivable, net of allowance for doubtful accounts of $5,587 and $4,255, respectively	80,912	70,830
Unbilled work in process, net of allowance for doubtful accounts of $1,302 and $1,341, respectively	39,821	71,891
Income taxes receivable	4,282	0
Deferred income taxes	6,507	2,854
Receivable from affiliates	0	8,631
Property and equipment, net	42,372	31,034
Operating lease right-of-use asset	135,240	0
Goodwill and other intangibles, net	812,844	794,604
Other assets	38,890	34,695
Total assets	1,677,003	1,425,912
Liabilities:
Accrued salaries and bonuses	420,376	404,717
Accounts payable and accrued expenses	53,883	55,048
Deferred income	26,780	27,812
Income taxes payable	0	7,759
Deferred income taxes	664	8,058
Loans payable to former shareholders	1,393	2,047
Loan payable to non-affiliate	3,283	6,610
Operating lease liabilities	154,218	0
Other liabilities	32,024	22,532
Total liabilities	692,621	534,583
Commitments and contingencies (Note 17)
Stockholders' equity:
Additional paid-in capital	649,954	645,090
Retained earnings	377,471	276,468
Total stockholders' equity	984,382	891,329
Total liabilities and stockholders' equity	1,677,003	1,425,912
Class A
Stockholders' equity:
Common stock	46	38
Class B
Stockholders' equity:
Common stock	$ 19	$ 27