Investments (Details 9) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Jun. 30, 2011
Progression of the credit-related portion of OTTI on investments
Beginning balance	$ (3,343)	$ (3,425)	$ (3,301)
Additional credit impairments on:
Previously impaired securities	(127)	(23)	(413)
Securities without previous impairments
Total additional credit impairments securities	(127)	(23)	(413)
Reductions for securities sold (realized)	45	782	371
Ending balance	$ (3,425)	$ (2,666)	$ (3,343)