Investment Securities Available for Sale (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 securities	Dec. 31, 2012	Dec. 31, 2011
Investments [Abstract]
Pledged to secure deposits	$ 2,380,000,000	$ 2,280,000,000
Securities in a loss position for less than twelve months	80
Securities in a loss position for more than twelve months	5
Other-than-temporary impairment charges	$ 264,000	$ 450,000	$ 1,600,000