Investment Securities (Held-to-Maturity Securities Gross Realized Gains and Losses) (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Realized Gain (Loss) on Held-to-Maturity Securities	$ 0	$ 0	$ 0	$ 0

This item represents the gain (loss) realized on the sale of held-to-maturity securities disposed of during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563

Name:	us-gaap_HeldtomaturitySecuritiesSoldSecurityRealizedGainLossExcludingOtherThanTemporaryImpairments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration