Subordinated Debt Securities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		0 Months Ended	9 Months Ended			0 Months Ended	9 Months Ended
	Sep. 30, 2014 Subordinated Debt Due In 2035 [Member]	Jun. 21, 2005 Subordinated Debt Due In 2035 [Member]	Jun. 21, 2005 Subordinated Debt Due In 2035 [Member] Trust I [Member]	Sep. 30, 2014 Subordinated Debt Due In 2035 [Member] Trust I [Member]	Sep. 30, 2014 Subordinated Debt Due In 2037 [Member]	Aug. 23, 2007 Subordinated Debt Due In 2037 [Member]	Aug. 23, 2007 Subordinated Debt Due In 2037 [Member] Trust II [Member]	Sep. 30, 2014 Subordinated Debt Due In 2037 [Member] Trust II [Member]
Subordinated Borrowing [Line Items]
Long-term debt, gross		$ 30.9		$ 30.9		$ 25.8		$ 25.8
Proceeds from issuance of trust preferred securities			30.0				25.0
Proceeds from issuance of common stock			$ 0.9				$ 0.8
Subordinated borrowing, interest rate			7.725%				8.28%
Debt instrument, interest rate fixed to floating date	Jun. 15, 2015							Sep. 15, 2017
Debt instrument, maturity date	Jun. 15, 2035				Sep. 15, 2037
Debt instrument, description of variable rate basis				interest will adjust quarterly to the three-month LIBOR rate plus 3.25 percentage				three-month LIBOR rate plus 2.90 percentage
Debt instrument, basis spread on variable rate				3.25%				2.90%