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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net income for the period |  | $ 141,638 | $ 220,302
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization of intangible assets |  | 237,416 | 253,483
Share-based compensation expense |  | 52,030 | 28,343
Pension expense |  | 3,444 | 3,015
Amortization of debt issuance costs |  | 3,166 | 2,454
Write-off of right of use assets |  | 3,775 | 0
Loss on extinguishment of debt |  | 8,131 | 27,413
Loss on sale and write down of property and equipment |  | 121 | 38
Deferred taxes |  | (46,802) | 20,892
Share in net (income) loss of equity investees |  | 6,823 | (31,357)
Unrealized loss on financial instruments |  | 9,854 | 0
Changes in operating assets and liabilities: |  |  |
Accounts receivable |  | (26,597) | 51,187
Contract assets |  | (18,454) | (18,745)
Prepaid expenses and other current assets |  | (3,065) | (11,221)
Income taxes |  | 44,240 | 2,776
Accounts payable and accrued liabilities |  | 8,964 | (108,629)
Deferred revenue |  | (29,133) | (50,693)
Other assets |  | (60,706) | 16,913
Operating lease assets and liabilities, net |  | (7,716) | 142
Net cash provided by operating activities |  | 327,129 | 406,313
Cash flows from investing activities: |  |  |
Additions of property and equipment |  | (68,539) | (37,347)
Purchase of Zix Corporation, net of cash acquired |  | 0 | (837,573)
Purchase of Bricata Inc. |  | 0 | (17,927)
Other investing activities |  | (873) | (3,271)
Net cash used in investing activities |  | (69,412) | (896,118)
Cash flows from financing activities: |  |  |
Proceeds from issuance of Common Shares from exercise of stock options and ESPP |  | 15,773 | 45,688
Proceeds from long-term debt and Revolver |  | 1,000,000 | 1,500,000
Repayment of long-term debt and Revolver |  | (5,000) | (855,000)
Debt extinguishment costs |  | 0 | (24,969)
Debt issuance costs |  | (11,650) | (15,347)
Repurchase of Common Shares |  | 0 | (91,034)
Purchase of treasury stock |  | 0 | (19,593)
Distribution to non-controlling interest |  | 0 | (396)
Payments of dividends to shareholders |  | (129,562) | (119,536)
Net cash provided by financing activities |  | 869,561 | 419,813
Foreign exchange gain (loss) on cash held in foreign currencies |  | (271) | (25,713)
Increase (decrease) in cash, cash equivalents and restricted cash during the period |  | 1,127,007 | (95,705)
Cash, cash equivalents and restricted cash at beginning of the period |  | 1,695,911 | 1,609,800
Cash, cash equivalents and restricted cash at end of the period |  | 2,822,918 | 1,514,095
Reconciliation of cash, cash equivalents and restricted cash: |  |  |
Cash and cash equivalents |  | 2,820,927 | 1,511,792
Restricted cash | [1] | 1,991 | 2,303
Total cash, cash equivalents and restricted cash |  | $ 2,822,918 | $ 1,514,095
[1] | Restricted cash is classified under the Prepaid expenses and other current assets and Other assets line items on the Condensed Consolidated Balance Sheets (Note 9).

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