Investment Securities NonCreditRelatedLossesOnSecuritiesNotExpectedToBeSol (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Non Credit Related Losses On Securities Not Expected To Be Sold [Line Items]
Noncredit Related Losses On Securities Not Expected To Be Sold	$ 0	$ 693	$ 0	$ 22,069
Available-for-sale Securities [Member]
Schedule of Non Credit Related Losses On Securities Not Expected To Be Sold [Line Items]
Noncredit Related Losses On Securities Not Expected To Be Sold	0
Held-to-maturity Securities [Member]
Schedule of Non Credit Related Losses On Securities Not Expected To Be Sold [Line Items]
Noncredit Related Losses On Securities Not Expected To Be Sold	0	0	0	16,114
Available-for-sale Securities [Member]
Schedule of Non Credit Related Losses On Securities Not Expected To Be Sold [Line Items]
Noncredit Related Losses On Securities Not Expected To Be Sold		$ 693	$ 0	$ 5,955