Borrowings (Narrative) (Details) (Trust Preferred Securities Subject to Mandatory Redemption [Member], Private Placement [Member], Capital Securities [Member], USD $) In Millions, unless otherwise specified	55 Months Ended
	Dec. 31, 2012	Apr. 07, 2008
Trust Preferred Securities Subject to Mandatory Redemption [Member] | Private Placement [Member] | Capital Securities [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Financial Instruments Subject to Mandatory Redemption, Basis Spread on Variable Rate	3.50%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Description of Variable Rate Basis	three-month LIBOR
Financial Instruments Subject to Mandatory Redemption, Share Issued, Amount		$ 10.0