Securities (Cumulative life credit losses recognized in earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)			$ (358)	$ 627
Debt Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)	0	(37)	21	310
Private-label CMOs [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative OTTI credit losses, beginning balance	0	252	0	2,949
Additional increases for OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	0	0	0	649
Reduction due to credit impaired securities sold	0	(112)	0	(3,458)
Cumulative OTTI credit losses recognized for securities still held, ending balance	$ 0	$ 140	$ 0	$ 140