Significant Accounting Policies and Pronouncements - Adoption of New Accounting Pronouncements - Impact of DAC Restatement CF (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ (237,147)	$ 34,652	$ 135,200	$ 156,172
Change in:
Deferred policy acquisition costs			94,097	114,169
Income taxes payable			47,777	50,957
Cash flows from operating activities			349,102	421,109
Restatement Adjustment [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income				11,943
Change in:
Deferred policy acquisition costs				(20,489)
Income taxes payable				8,546
Cash flows from operating activities				0
Scenario, Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income				144,229
Change in:
Deferred policy acquisition costs				134,658
Income taxes payable				42,411
Cash flows from operating activities				$ 421,109