16. Statutory Financial Information and Regulatory Matters (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Notes to Financial Statements
Statutory capital and surplus	$ 313.5	$ 312.8	$ 275.7
Asset valuation reserve	7.5	7.3	3.1
Statutory capital, surplus and asset valuation reserve	321.0	320.1	278.8
Statutory gain (loss) from operations	61.9	56.4	77.6
Statutory net income (loss)	$ 49.7	$ 61.4	$ 47.0