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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Cash flows from operating activities: |  |  |
Net income | $ 312,771 | $ 183,793 | $ 159,106
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Deferred tax benefit | (21,237) | (9,654) | (10,687)
Provision for bad debts, net | 7,290 | 4,873 | 1,707
Unrealized gains on investment securities | (99) | (75) | (430)
Non-cash lease expense | 22,756 | 24,654 | 0
Depreciation and amortization | 15,228 | 17,291 | 14,475
Contingent consideration valuation | 478 | (1,220) | (708)
Compensation expense — equity and liability classified share awards (Note 14) | 62,421 | 64,345 | 56,561
Changes in operating assets and liabilities: |  |  |
Accounts receivable | (32,965) | (13,387) | 21,611
Unbilled work in progress | (78,526) | 32,423 | (26,029)
Unbilled work in progress | (11,579) | (4,515) | (12,706)
Accrued salaries and bonuses | 228,546 | 11,351 | 18,868
Accounts payable and accrued expenses and other | 535 | (8,709) | 11,542
Deferred income | (991) | 1,058 | 6,661
Income taxes payable/(receivable) | 73,227 | (12,443) | (2,375)
Net cash provided by operating activities | 579,837 | 287,669 | 224,274
Cash flows from investing activities: |  |  |
Purchases of investment securities | (391,555) | (350,679) | (146,969)
Sales or maturities of investment securities | 318,425 | 340,624 | 231,460
Acquisition of business, net of cash acquired | (12,470) | (2,197) | (71,407)
Receivables from affiliates | 0 | (170) | 101
Purchase of property and equipment, net | (14,148) | (20,722) | (6,726)
Net cash provided by/(used in) investing activities | (99,748) | (33,144) | 6,459
Cash flows from financing activities: |  |  |
Dividends paid | (92,006) | (80,655) | (66,928)
Settlement of forward purchase contract | 0 | 0 | (93,500)
Share repurchases | (102,224) | (29,641) | (69,563)
Payments to settle employee tax obligations on share-based awards | (17,810) | (31,477) | (1,947)
Proceeds from issuance of Class A shares | 189,060 | 0 | 0
Earnouts paid | 0 | 0 | (1,923)
Loans payable to former shareholders redeemed | (575) | (654) | (989)
Repayments of loans to non-affiliates | (3,601) | (10,081) | (1,475)
Other financing activities | 333 | 369 | 187
Net cash (used in) financing activities | (26,823) | (152,139) | (236,138)
Effects of exchange rate changes on cash and cash equivalents | 13,212 | (7,755) | (8,703)
Net increase/(decrease) in cash, cash equivalents, and restricted cash | 466,478 | 94,631 | (14,108)
Cash, cash equivalents and restricted cash – beginning of period | 380,746 | 286,115 | 300,223
Cash, cash equivalents and restricted cash – end of period | 847,224 | 380,746 | 286,115
Supplemental disclosures of non-cash activities: |  |  |
Shares issued via vesting of liability classified awards | 7,511 | 6,555 | 5,005
Shares issued as consideration for acquisitions | 1,050 | 0 | 1,744
Cash acquired through acquisitions | 88 | 15,755 | 16,141
Cash paid during the year: |  |  |
Interest | 989 | 1,049 | 977
Taxes, net of refunds | $ 44,202 | $ 73,881 | $ 80,841

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash inflow or outflow associated with long-term loans for related parties where one party can exercise control or significant influence over another party, including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from (Payments for) Advances to Affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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