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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income | $ 148,013 | $ 135,103 | $ (29,951) | $ 140,461 | $ 161,184 | $ 173,438 | $ 166,730 | $ 170,957 | $ 393,626 | $ 672,309 | $ 606,011
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |  |  |  |  |  |  |  |  |
Net (gains) losses on investments and other financial instruments | (17,376) | $ (17,652) | $ (47,276) | 22,027 | (4,257) | (13,009) | (12,540) | (21,913) | (60,277) | (51,719) | 42,476
Loss on extinguishment of debt |  |  |  |  | 0 | 5,940 | 16,798 | 0 | 0 | 22,738 | 0
Deferred income tax provision |  |  |  |  |  |  |  |  | 102,079 | 157,162 | 120,573
Impairment of goodwill |  |  |  |  | 4,828 | $ 0 | $ 0 | 0 | 0 | 4,828 | 0
Amortization and impairment of other acquired intangible assets |  |  |  |  |  |  |  |  | 5,144 | 22,288 | 12,429
Depreciation, other amortization, and other impairments, net |  |  |  |  |  |  |  |  | 66,585 | 50,439 | 56,661
Change in: |  |  |  |  |  |  |  |  |  |  |
Accrued investment income |  |  |  |  |  |  |  |  | (1,714) | 2,545 | (3,485)
Accounts and notes receivable |  |  |  |  |  |  |  |  | (29,280) | (25,504) | (4,599)
Reinsurance recoverables |  |  |  |  |  |  |  |  | (56,226) | (2,574) | (2,497)
Deferred policy acquisition costs |  |  |  |  |  |  |  |  | 2,454 | (3,448) | (324)
Prepaid reinsurance premiums |  |  |  |  |  |  |  |  | 96,218 | 53,772 | (31,119)
Unearned premiums |  |  |  |  |  |  |  |  | (178,031) | (112,535) | 15,419
Reserve for losses and LAE |  |  |  |  |  |  |  |  | 443,648 | 3,404 | (109,642)
Reinsurance funds withheld |  |  |  |  |  |  |  |  | (13,274) | (29,383) | 32,814
Other assets |  |  |  |  |  |  |  |  | (57,538) | (130,953) | 49,868
Other liabilities |  |  |  |  |  |  |  |  | (54,980) | 61,062 | (106,799)
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 658,434 | 694,431 | 677,786
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | 963,589 | 986,647 | 728,584
Proceeds from sales of Trading securities |  |  |  |  |  |  |  |  | 11,602 | 130,537 | 58,317
Proceeds from sales of Equity securities |  |  |  |  |  |  |  |  | 90,450 | 69,779 | 95,697
Proceeds from redemptions of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | 645,068 | 464,777 | 457,595
Proceeds from redemptions of Trading securities |  |  |  |  |  |  |  |  | 22,913 | 37,684 | 54,329
Purchases of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | (2,449,762) | (1,913,703) | (1,875,069)
Purchases of Equity securities |  |  |  |  |  |  |  |  | (85,014) | (57,422) | (69,160)
Sales, redemptions and (purchases) of Short-term investments, net |  |  |  |  |  |  |  |  | (82,925) | 8,017 | (108,325)
Sales, redemptions and (purchases) of Other assets and other invested assets, net |  |  |  |  |  |  |  |  | 1,434 | (739) | 2,590
Proceeds from sale of subsidiary, net of cash sold |  |  |  |  |  |  |  |  | 16,481 | 0 | 0
Purchases of property and equipment |  |  |  |  |  |  |  |  | (17,016) | (27,626) | (26,008)
Acquisitions, net of cash acquired |  |  |  |  |  |  |  |  | 0 | 0 | (7,964)
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | (883,180) | (302,049) | (689,414)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Dividends and dividend equivalents paid |  |  |  |  |  |  |  |  | (97,458) | (2,061) | (2,140)
Issuance of senior notes, net |  |  |  |  |  |  |  |  | 515,567 | 442,439 | 0
Repayments and repurchases of senior notes |  |  |  |  |  |  |  |  | 0 | (610,763) | 0
Issuance of common stock |  |  |  |  |  |  |  |  | 1,553 | 2,416 | 1,385
Repurchases of common shares |  |  |  |  |  |  |  |  | (226,305) | (300,201) | (50,053)
Proceeds from (Payments for) Other Financing Activities |  |  |  |  |  |  |  |  | (2,292) | (989) | (1,510)
Change in secured borrowings, net (with terms three months or less) |  |  |  |  |  |  |  |  | (37,475) | 13,862 | 39,342
Proceeds from secured borrowings (with terms greater than three months) |  |  |  |  |  |  |  |  | 207,034 | 115,275 | 56,449
Repayments of secured borrowings (with terms greater than three months) |  |  |  |  |  |  |  |  | (137,927) | (62,932) | (20,917)
Repayment of other borrowings |  |  |  |  |  |  |  |  | (79) | (152) | (170)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | 222,618 | (403,106) | 22,386
Effect of exchange rate changes on cash and restricted cash |  |  |  |  |  |  |  |  | 0 | (4) | 0
Increase (decrease) in cash and restricted cash |  |  |  |  |  |  |  |  | (2,128) | (10,728) | 10,758
Cash and restricted cash, beginning of period |  |  |  | 96,274 |  |  |  | 107,002 | 96,274 | 107,002 | 96,244
Cash and restricted cash, end of period | 94,146 |  |  |  | 96,274 |  |  |  | 94,146 | 96,274 | 107,002
Supplemental disclosures of cash flow information: |  |  |  |  |  |  |  |  |  |  |
Income taxes paid (Note 10) |  |  |  |  |  |  |  |  | 81,404 | 71,469 | 8,364
Interest paid |  |  |  |  |  |  |  |  | 60,564 | 45,762 | 56,688
Parent Company |  |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 393,626 | 672,309 | 606,011
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |  |  |  |  |  |  |  |  |
Net (gains) losses on investments and other financial instruments |  |  |  |  |  |  |  |  | (5,682) | (12,863) | 470
Loss on extinguishment of debt |  |  |  |  |  |  |  |  | 0 | (22,738) | 0
Change in: |  |  |  |  |  |  |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | (13,741) | 143,664 | 254,698
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | 304,737 | 296,171 | 6,779
Proceeds from sales of Trading securities |  |  |  |  |  |  |  |  | 0 | 56,787 | 0
Proceeds from sales of Equity securities |  |  |  |  |  |  |  |  | 13,401 | 16,916 | 0
Proceeds from redemptions of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | 238,161 | 149,767 | 12,391
Proceeds from redemptions of Trading securities |  |  |  |  |  |  |  |  | 0 | 114 | 0
Purchases of Fixed-maturity investments available for sale |  |  |  |  |  |  |  |  | (691,874) | (293,284) | (37,552)
Sales, redemptions and (purchases) of Short-term investments, net |  |  |  |  |  |  |  |  | (53,024) | 157,045 | (131,164)
Sales, redemptions and (purchases) of Other assets and other invested assets, net |  |  |  |  |  |  |  |  | 6,068 | 6,958 | 3,317
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  | (180,717) | 316,679 | (183,201)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Dividends and dividend equivalents paid |  |  |  |  |  |  |  |  | (97,458) | (2,061) | (2,140)
Issuance of senior notes, net |  |  |  |  |  |  |  |  | 515,567 | 442,439 | 0
Repayments and repurchases of senior notes |  |  |  |  |  |  |  |  | 0 | (610,763) | 0
Issuance of common stock |  |  |  |  |  |  |  |  | 1,553 | 2,416 | 1,385
Repurchases of common shares |  |  |  |  |  |  |  |  | (226,305) | (300,201) | (50,053)
Proceeds from (Payments for) Other Financing Activities |  |  |  |  |  |  |  |  | (2,292) | (989) | (1,510)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | 191,065 | (469,159) | (52,318)
Effect of exchange rate changes on cash and restricted cash |  |  |  |  |  |  |  |  | 0 | (2) | 0
Increase (decrease) in cash and restricted cash |  |  |  |  |  |  |  |  | (3,393) | (8,818) | 19,179
Cash and restricted cash, beginning of period |  |  |  | $ 23,534 |  |  |  | $ 32,352 | 23,534 | 32,352 | 13,173
Cash and restricted cash, end of period | $ 20,141 |  |  |  | $ 23,534 |  |  |  | $ 20,141 | $ 23,534 | $ 32,352

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- Definition The cash inflow from a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for the payment of debt classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The cash outflow from a repayment of a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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