CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (72,930)	$ (19,555)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and other amortization	22,858	24,696
Deferred tax (benefit) provision	(8)	72
Realized investment gains, excluding impairment losses	(1,259)	(77,561)
Other	6,335	(2,609)
Change in certain assets and liabilities:
Accrued investment income	(4,047)	3,652
Reinsurance recoverable on loss reserves	8,669	12,318
Reinsurance recoverable on paid losses	2,322	2,401
Premiums receivable	(4,813)	3,339
Deferred insurance policy acquisition costs	(963)	(1,196)
Loss reserves	(208,495)	(348,342)
Premium deficiency reserve	(1,650)	(14,183)
Unearned premiums	1,373	(7,491)
Income taxes payable (current)	899	844
Net cash used in operating activities	(251,709)	(423,615)
Cash flows from investing activities:
Purchase of fixed maturities	(975,555)	(1,833,039)
Purchase of equity securities	(18)	(21)
Proceeds from sale of fixed maturities	361,119	1,519,761
Proceeds from maturity of fixed maturities	282,701	617,036
Net increase in payable for securities	43,435	26,685
Net cash (used in) provided by investing activities	(288,318)	330,422
Cash flows from financing activities:
Net proceeds from convertible senior notes	484,670	0
Common stock shares issued	663,542	0
Net cash provided by financing activities	1,148,212	0
Net increase (decrease) in cash and cash equivalents	608,185	(93,193)
Cash and cash equivalents at beginning of period	1,027,625	995,799
Cash and cash equivalents at end of period	$ 1,635,810	$ 902,606