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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Cash flows from operating activities: |  |
Net income | $ 149,805 | $ 151,941
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 13,052 | 11,908
Deferred tax expense | 15,877 | 7,755
Net realized investment (gains) losses | (1,891) | 526
Change in certain assets and liabilities: |  |
Accrued investment income | 2,763 | 1,302
Reinsurance recoverable on loss reserves | (4,115) | 1,453
Reinsurance recoverable on paid losses | (170) | (121)
Premium receivable | 2,147 | 3,494
Deferred insurance policy acquisition costs | (983) | 258
Profit commission receivable | 1,121 | (2,836)
Loss reserves | 19,419 | (18,755)
Unearned premiums | (14,894) | (5,481)
Return premium accrual | (400) | (3,100)
Current income taxes | 22,527 | 30,983
Other, net | (19,934) | (14,446)
Net cash provided by operating activities | 184,324 | 164,881
Cash flows from investing activities: |  |
Purchases of investments | (280,614) | (348,746)
Proceeds from sales of investments | 224,803 | 106,010
Proceeds from maturity of fixed income securities | 222,544 | 202,929
Additions to property and equipment | (580) | (308)
Net cash provided by (used in) investing activities | 166,153 | (40,115)
Cash flows from financing activities: |  |
Repurchase of common stock | (119,997) | (11,640)
Dividends paid | (21,111) | 0
Payment of withholding taxes related to share-based compensation net share settlement | (8,899) | (5,652)
Net cash used in financing activities | (150,007) | (17,292)
Net increase in cash and cash equivalents and restricted cash and cash equivalents | 200,470 | 107,474
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period | 169,056 | 155,038
Cash and cash equivalents and restricted cash and cash equivalents at end of period | $ 369,526 | $ 262,512

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