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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Cash flows from operating activities: |  |
Net income | $ 22,249 | $ 29,553
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Amortization of deferred financing costs | 276 | 276
Amortization of investment discount/premium | 28 | 40
Depreciation and amortization | 33,436 | 66,624
Deferred income taxes | (4,909) | (10,499)
Stock-based compensation | 10,597 | 8,068
Impairment of right-of-use lease assets | 1,121 | 17,015
Changes in assets and liabilities: |  |
Tuition receivable, net | (25,162) | (28,947)
Other assets | (2,354) | (9,308)
Accounts payable and accrued expenses | (8,113) | (7,835)
Income taxes payable and income taxes receivable | 4,913 | 5,444
Contract liabilities | 51,901 | 58,937
Other liabilities | (3,307) | (3,537)
Net cash provided by operating activities | 80,676 | 125,831
Cash flows from investing activities: |  |
Purchases of property and equipment | (22,688) | (23,138)
Proceeds from marketable securities | 2,100 | 5,595
Other investments | (223) | (262)
Net cash used in investing activities | (20,811) | (17,805)
Cash flows from financing activities: |  |
Common dividends paid | (29,886) | (29,549)
Net payments for stock awards | (2,881) | (2,283)
Repurchase of common stock | (24,972) | (2,904)
Net cash used in financing activities | (57,739) | (34,736)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash | (4,981) | (1,396)
Net increase (decrease) in cash, cash equivalents, and restricted cash | (2,855) | 71,894
Cash, cash equivalents, and restricted cash — beginning of period | 279,212 | 202,020
Cash, cash equivalents, and restricted cash — end of period | 276,357 | 273,914
Non-cash transactions: |  |
Non-cash additions to property and equipment | 1,239 | 6,600
Right-of-use lease assets obtained in exchange for operating lease liabilities | $ 1,518 | $ 48,143

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