Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Commitments and Contingencies (Textual) [Abstract]
Letters of credit issued and outstanding	$ 84.4
Investment assets pledged for line of credit facility	89.4
Irrevocable letters of credit [Member]
Commitments and Contingencies (Textual) [Abstract]
Letters of credit issued and outstanding	1.8
Letters of credit issued to other parties	0.8
Benefit of the Vermont Department of Banking	$ 1.0