Investments (Details 8) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Progression of the credit-related portion of OTTI on investments
Beginning balance	$ (3,426)	$ (3,475)	$ (3,425)	$ (3,590)
Additional credit impairments on:
Previously impaired securities	(15)		(16)	(77)
Securities without previous impairments
Total additional credit impairments securities	(15)		(16)	(77)
Reductions for securities sold (realized)		132		324
Ending balance	$ (3,441)	$ (3,343)	$ (3,441)	$ (3,343)