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v3.21.1

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities |  |
Net income | $ 109,695 | $ 78,952
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Deferred income taxes | 19,736 | 15,932
Depreciation and amortization | 3,460 | 3,463
Stock-based compensation | 451 | 435
Amortization of debt discount and issuance costs | 2,211 | 2,032
Amortization of discount on short-term investments | 0 | (272)
Amortization of lease guarantee | 0 | (81)
Changes in fair values of equity and long-term investments, net | (54,673) | (21,915)
Other non-cash items | 8 | 0
Changes in operating assets and liabilities: |  |
Receivables from collaborative arrangements | 4,957 | (2,707)
Prepaid expenses and other current assets | 571 | 140
Accounts payable | (52) | 112
Accrued personnel-related expenses and other accrued liabilities | 227 | (126)
Accrued interest payable | (2,484) | (2,484)
Net cash provided by operating activities | 84,107 | 73,481
Cash flows from investing activities |  |
Maturities of marketable securities | 0 | 54,000
Purchases of marketable securities | 0 | (12,943)
Purchases of equity and long term investments | (26,394) | (25,000)
Purchases of property and equipment | 0 | (13)
Net cash provided by (used in) investing activities | (26,394) | 16,044
Cash flows from financing activities |  |
Repurchase of shares to satisfy tax withholding | (25) | (55)
Proceeds from issuances of common stock, net | 0 | 225
Distributions to noncontrolling interest | (21,285) | (15,810)
Net cash used in financing activities | (21,310) | (15,640)
Net increase in cash and cash equivalents | 36,403 | 73,885
Cash and cash equivalents at beginning of period | 246,487 | 278,096
Cash and cash equivalents at end of period | 282,890 | 351,981
Supplemental disclosure of cash flow information |  |
Cash paid for interest | $ 4,967 | $ 4,967

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