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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities: |  |
Net loss attributable to common shareholders | $ (256,678) | $ (1,960,431)
Noncontrolling interest in subsidiaries' earnings | (2,676) | 60
Net loss | (259,354) | (1,960,371)
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation and amortization | 3,066 | 3,733
Amortization of bond premium and discount | (189,402) | (186,314)
Reorganization items | 7,215 | 49,861
Share-based compensation |  | (15,459)
Deferred income taxes | 1,586 |
Current income taxes | 1,069 | 73,175
Deferred acquisition costs | 24,350 | 27,139
Unearned premiums, net | (635,346) | (507,174)
Losses and loss expenses, net | (261,304) | 1,786,959
Ceded premiums payable | (21,028) | (25,895)
Investment income due and accrued | 5,586 | (262)
Premium receivables | 407,858 | 394,117
Accrued interest payable | 89,276 | 108,461
Net mark-to-market losses (gains) | 22,932 | (31,031)
Net realized investment gains | (72,101) | (17,347)
Other-than-temporary impairment charges | 5,990 | 63,843
Losses (gains) on extinguishment of debt | 177,580 | (3,119)
Variable interest entity activities | (27,777) | 214,368
Other, net | 105,906 | 28,873
Net cash (used in) provided by operating activities | (613,898) | 3,557
Cash flows from investing activities: |  |
Proceeds from sales of bonds | 592,672 | 635,178
Proceeds from matured bonds | 1,109,468 | 675,932
Purchases of bonds | (798,740) | (1,251,271)
Change in short-term investments | 121,413 | 208,496
Loans, net | 9,793 | 1,171
Change in swap collateral receivable | 43,635 | (45,380)
Other, net | (40,261) | 3,900
Net cash provided by investing activities | 1,037,980 | 228,026
Cash flows from financing activities: |  |
Proceeds received from a newly established variable interest entity |  | 35,600
Paydowns of variable interest entity secured borrowing | (21,012) |
Proceeds from issuance of investment and repurchase agreements |  | 123
Payments for investment and repurchase agreement draws | (186,786) | (258,364)
Payments for extinguishment of debt | (188,446) |
Net cash collateral received |  | (2,440)
Net cash used in financing activities | (396,244) | (225,081)
Net cash flow | 27,838 | 6,502
Cash at January 1 | 15,999 | 9,497
Cash at December 31 | 43,837 | 15,999
Supplemental disclosure of cash flow information: |  |
Income taxes | 1,493 | 1,991
Interest on variable interest entity secured borrowing | 1,572 |
Interest on investment agreements | 7,264 | 8,456
Cash receipts and payments related to reorganization items: |  |
Professional fees paid for services rendered in connection with the Chapter 11 proceeding | $ 9,141 | $ 31,253

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