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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net income | $ 46,514 | $ 117,051 | $ 106,935
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Bad debt expense | 453 | 467 | 501
Depreciation and amortization | 4,957 | 4,820 | 4,058
Amortization of share-based compensation | 13,008 | 12,786 | 10,515
Amortization of original issue discount on debt | 0 | 0 | 10
Book overdraft increase (decrease) | (12,442) | 66,128 | 36,715
Net realized (gains) losses sale on investments | 12,715 | 2,089 | (2,570)
Net change in unrealized gains (losses) of equity securities | (23,188) | 17,169 | 0
Amortization of premium/accretion of discount, net | 1,663 | 1,482 | 3,994
Deferred income taxes | 1,972 | (3,740) | 1,309
Excess tax (benefit) shortfall from share-based compensation | (641) | (5,427) | (5,793)
Other | 411 | 196 | 35
Issuance of common stock | 147 | 0 | 634
Net change in assets and liabilities relating to operating activities: |  |  |
Prepaid reinsurance premiums | (32,458) | (9,944) | (8,421)
Reinsurance recoverable | 225,367 | (236,198) | (182,299)
Reinsurance receivable, net | 0 | 0 | 186
Premiums receivable, net | (4,475) | (3,823) | (3,162)
Accrued investment income | (330) | (1,149) | (708)
Income taxes recoverable | (22,483) | 3,741 | (417)
Deferred policy acquisition costs, net | (7,196) | (11,627) | (8,147)
Other assets | (2,498) | (968) | (1,860)
Unpaid losses and loss adjustment expenses | (205,069) | 224,404 | 189,931
Unearned premiums | 59,600 | 69,235 | 56,688
Accounts payable | (960) | 193 | (321)
Reinsurance payable, net | 29,275 | (17,075) | 29,490
Other liabilities and accrued expenses | (4,497) | 289 | 9,287
Advance premium | 4,753 | 6 | 8,420
Net cash provided by (used in) operating activities | 84,598 | 230,105 | 245,010
Cash flows from investing activities: |  |  |
Proceeds from sale of property and equipment | 38 | 35 | 23
Purchases of property and equipment | (11,314) | (6,731) | (4,618)
Purchases of equity securities | (1,351) | (25,803) | (89,302)
Purchases of available-for-sale debt securities | (221,647) | (437,635) | (180,604)
Purchases of short-term investments | 0 | 0 | (10,000)
Purchases of investment real estate, net | (883) | (6,375) | (7,218)
Proceeds from sales of equity securities | 29,680 | 8,285 | 77,640
Proceeds from sales of available-for-sale debt securities | 77,790 | 134,591 | 26,179
Proceeds from sales of investment real estate | 10,537 | 0 | 0
Maturities of available-for-sale debt securities | 145,476 | 111,347 | 97,191
Maturities of short-term investments | 0 | 10,000 | 5,000
Net cash provided by (used in) investing activities | 28,326 | (212,286) | (85,709)
Cash flows from financing activities: |  |  |
Preferred stock dividend | (10) | (10) | (10)
Common stock dividend | (26,106) | (25,508) | (24,001)
Issuance of common stock for stock option exercises | 239 | 102 | 0
Purchase of treasury stock | (66,186) | (25,276) | (18,141)
Payments related to tax withholding for share-based compensation | (3,709) | (12,714) | (7,223)
Repayment of debt | (1,471) | (1,471) | (2,170)
Net cash provided by (used in) financing activities | (97,243) | (64,877) | (51,545)
Cash and cash equivalents, and restricted cash and cash equivalents: |  |  |
Net increase (decrease) during the period | 15,681 | (47,058) | 107,756
Balance, beginning of period | 169,063 | 216,121 | 108,365
Balance, end of period | 184,744 | 169,063 | 216,121
Supplemental cash and non-cash flow disclosures: |  |  |
Interest paid | 248 | 346 | 348
Income taxes paid | 38,945 | 41,996 | 68,883
Income tax refund | 789 | 747 | 434
Cash and cash equivalents, and restricted cash and cash equivalents within the Consolidated Balance Sheets |  |  |
Total cash and cash equivalents and restricted cash and cash equivalents | $ 169,063 | $ 169,063 | $ 216,121

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + 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 Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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