Long Term Subordinated Notes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Debt Instrument [Line Items]
Floating rate terms	interest will be based on the 3 month LIBOR plus 238.5 basis points, reset quarterly, payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year, subject to Holdings' right to defer interest on one or more occasions for up to ten consecutive years.
Percentage of principal amount required for redemption	100.00%
Redemption date	May 01, 2047
Commencement date for cash tender offer for any and all of the 6.60% fixed to floating rate long term subordinated notes	Mar. 19, 2009
Subordinated Debt [Member]
Debt Instrument [Line Items]
Annual interest rate, payable semi-annually in arrears on November 15 and May 15 of each year	6.60%
Percentage of principal amount required for redemption	100.00%
Outstanding debt reduction	161,441
Subordinated Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable spread on treasury rate	0.25%
Subordinated Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable spread on treasury rate	0.50%
Fixed Rate Interest Period [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Interest payment commencement date	Nov. 15, 2007
Interest basis, 3 month LIBOR plus number of basis points, reset quarterly	238.50%
Fixed Rate Interest Period [Member] | Subordinated Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate Period, Beginning Date	May 03, 2007
Fixed Rate Interest Period [Member] | Subordinated Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate Period, Ending Date	May 14, 2017
Right to defer interest on one or more occasions for up to number of consecutive years	10 years
Floating Rate Interest Period [Member]
Debt Instrument [Line Items]
Interest Rate Period, Beginning Date	May 15, 2017
Floating Rate Interest Period [Member] | Subordinated Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Right to defer interest on one or more occasions for up to number of consecutive years	10 years