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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended | 66 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 | Jun. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2017
Proceeds From Issuance of Tier II Notes |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 240,000 |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to common stockholders | $ (14,000) | $ (108,000) | $ (35,000) | $ (280,000) | $ (110,000) | $ 66,000 | $ (128,000) | $ (43,000) |  | (437,000) | (216,000) | 186,000 |  |
AMPS Exchange Loss Based on Carry Value |  |  |  |  |  |  |  |  |  | 0 | 0 | 82,000 |  |
Net income (loss) |  |  |  |  |  |  |  |  |  | (437,000) | (216,000) | 267,000 |  |
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 1,000 | 0 | 1,000 |  |
Amortization of bond premium and discount |  |  |  |  |  |  |  |  |  | (15,000) | (63,000) | (137,000) |  |
Share-based compensation |  |  |  |  |  |  |  |  |  | 11,000 | 12,000 | 12,000 |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  | (9,000) | 1,000 | 7,000 |  |
Current income taxes |  |  |  |  |  |  |  |  |  | 17,000 | 35,000 | (35,000) |  |
Unearned premiums, net |  |  |  |  |  |  |  |  |  | (48,000) | (132,000) | (163,000) |  |
Losses and loss expenses, net |  |  |  |  |  |  |  |  |  | 76,000 | (364,000) | (1,633,000) |  |
Ceded premiums payable |  |  |  |  |  |  |  |  |  | (3,000) | (4,000) | (5,000) |  |
Premium receivables |  |  |  |  |  |  |  |  |  | 44,000 | 77,000 | 91,000 |  |
Accrued interest payable |  |  |  |  |  |  |  |  |  | 93,000 | 87,000 | 9,000 |  |
Amortization of insurance intangible assets | 16,000 | 14,000 | 14,000 | 13,000 | 15,000 | 17,000 | 226,000 | 36,000 |  | 57,000 | 295,000 | 107,000 |  |
Net realized investment gains | (2,000) | (2,000) | (10,000) | (8,000) | (9,000) | (18,000) | (36,000) | (17,000) |  | (22,000) | (81,000) | (108,000) |  |
Net realized gains (losses) on extinguishment of debt |  |  |  |  |  |  |  |  |  | 0 | 0 | (3,000) |  |
Other, net |  |  |  |  |  |  |  |  |  | 59,000 | 79,000 | 68,000 |  |
Net cash used in operating activities |  |  |  |  |  |  |  |  |  | (175,000) | (311,000) | (1,543,000) |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of bonds |  |  |  |  |  |  |  |  |  | 1,109,000 | 1,212,000 | 1,248,000 |  |
Proceeds from matured bonds |  |  |  |  |  |  |  |  |  | 137,000 | 379,000 | 432,000 |  |
Purchases of bonds |  |  |  |  |  |  |  |  |  | (975,000) | (959,000) | (528,000) |  |
Proceeds from sales of other invested assets |  |  |  |  |  |  |  |  |  | 374,000 | 81,000 | 159,000 |  |
Purchases of other invested assets |  |  |  |  |  |  |  |  |  | (475,000) | (137,000) | (140,000) |  |
Change in short-term investments |  |  |  |  |  |  |  |  |  | 158,000 | (218,000) | 127,000 |  |
Change in cash collateral receivable |  |  |  |  |  |  |  |  |  | 0 | 100,000 | (58,000) |  |
Proceeds From Financial Guaranty Variable Interest Entity Assets |  |  |  |  |  |  |  |  |  | 178,000 | 543,000 | 349,000 |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  | (74,000) |  |  |  |
Other, net |  |  |  |  |  |  |  |  |  | 1,000 | (2,000) | 0 |  |
Net cash provided by investing activities |  |  |  |  |  |  |  |  |  | 432,000 | 1,000,000 | 1,588,000 |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Senior Surplus Notes |  |  |  |  |  |  |  |  |  | 0 | 0 | 24,000 |  |
Paydown of Ambac Note |  |  |  |  |  |  |  |  |  | (121,000) | (178,000) | (214,000) |  |
Paydown Of Variable Interest Entity Secured Borrowing |  |  |  |  |  |  |  |  |  | 0 | 0 | 74,000 |  |
Payments for extinguishment of surplus notes |  |  |  |  |  |  |  |  |  | 0 | 0 | (191,000) |  |
Payments of Debt Issuance Costs |  |  |  |  |  |  |  |  |  | 0 | 0 | (9,000) |  |
AMPS Proceeds |  |  |  |  |  |  |  |  |  | 0 | 19,000 | 0 |  |
AMPS Exchange Cash Paid |  |  |  |  |  |  |  |  | $ (11,000) | 0 | 0 | (11,000) |  |
Payment, Tax Withholding, Share-based Payment Arrangement |  |  |  |  |  |  |  |  |  | (3,000) | (3,000) | (1,000) |  |
Payments for Repurchase of Warrants |  |  |  |  |  |  |  |  |  |  |  |  | $ (8,000) |
Paydown of Financial Guaranty Variable Interest Entity Liabilities |  |  |  |  |  |  |  |  |  | (178,000) | (542,000) | (349,000) |  |
Net Cash Provided by (Used in) Financing Activities |  |  |  |  |  |  |  |  |  | (303,000) | (691,000) | (585,000) |  |
Effect of Exchange Rate on Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |  |
Cash and Cash Equivalents, Period Increase (Decrease) |  |  |  |  |  |  |  |  |  | (46,000) | (2,000) | (541,000) |  |
Cash and cash equivalents end of period | 20,000 |  |  |  | 24,000 |  |  |  |  | 20,000 | 24,000 | 63,000 | 20,000 |
Supplemental disclosure of cash flow information |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes Paid |  |  |  |  |  |  |  |  |  | 11,000 | 21,000 | 35,000 |  |
Cash payments related to reorganization items: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest entity activities | (3,000) | $ 0 | $ 0 | $ (3,000) | (7,000) | $ (11,000) | $ (3,000) | $ (16,000) |  | (5,000) | (38,000) | (3,000) |  |
Increase (Decrease) in Derivative Assets and Liabilities |  |  |  |  |  |  |  |  |  | 6,000 | (1,000) | (17,000) |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 35,000 |  |  |  | 81,000 |  |  |  |  | 35,000 | 81,000 | 83,000 | 35,000 | $ 625,000
Proceeds From Issuance of Ambac UK Debt |  |  |  |  |  |  |  |  |  | 0 | 12,000 | 0 |  |
Ambac Financial Group, Inc Parent Company Only [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to common stockholders |  |  |  |  |  |  |  |  |  | (437,000) | (216,000) | 186,000 |  |
Net income (loss) |  |  |  |  |  |  |  |  |  | (437,000) | (216,000) | 186,000 |  |
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of bond premium and discount |  |  |  |  |  |  |  |  |  | (6,000) | (6,000) | (7,000) |  |
Share-based compensation |  |  |  |  |  |  |  |  |  | 11,000 | 12,000 | 12,000 |  |
Current income taxes |  |  |  |  |  |  |  |  |  | 30,000 | 15,000 | (15,000) |  |
Net realized investment gains |  |  |  |  |  |  |  |  |  | 1,000 | 2,000 | 2,000 |  |
Other, net |  |  |  |  |  |  |  |  |  | (10,000) | (6,000) | 0 |  |
Net cash used in operating activities |  |  |  |  |  |  |  |  |  | 11,000 | 16,000 | 32,000 |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from matured bonds |  |  |  |  |  |  |  |  |  | 46,000 | 86,000 | 230,000 |  |
Purchases of bonds |  |  |  |  |  |  |  |  |  | (45,000) | (2,000) | (137,000) |  |
Change in short-term investments |  |  |  |  |  |  |  |  |  | 89,000 | (125,000) | (123,000) |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  | (74,000) |  |  |  |
Net cash provided by investing activities |  |  |  |  |  |  |  |  |  | 16,000 | (22,000) | (21,000) |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
AMPS Exchange Cash Paid |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Cash and Cash Equivalents, Period Increase (Decrease) |  |  |  |  |  |  |  |  |  | (2,000) | (6,000) | 11,000 |  |
Cash and cash equivalents end of period | $ 7,000 |  |  |  | $ 9,000 |  |  |  |  | $ 7,000 | 9,000 | 15,000 | $ 7,000 |
Supplemental disclosure of cash flow information |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes Paid |  |  |  |  |  |  |  |  |  |  | $ 1,000 | $ 4,000 |  |

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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585 + Details
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