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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment Securities [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 4,996
Debt securities available for sale, Due from one to five years, Amortized Cost	151,747
Debt securities available for sale, Due after five years through ten years, Amortized Cost	258,466
Debt securities available for sale, Due after ten years, Amortized Cost	106,938
Debt securities available for sale, Amortized Cost	522,147
Debt securities available for sale, Due in one year or less, Fair Value	4,969
Debt securities available for sale, Due from one to five years, Fair Value	149,200
Debt securities available for sale, Due after five years through ten years, Fair Value	251,415
Debt securities available for sale, Due after ten years, Fair Value	104,613
Debt securities available for sale, Fair Value	510,197
Debt securities held to maturity, Due in one year or less, Amortized Cost	55,255
Debt securities held to maturity, Due from one to five years, Amortized Cost	161,111
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	103,311
Debt securities held to maturity, Due after ten years, Amortized Cost	182,228
Securities held to maturity, Amortized Cost	501,905	$ 516,466
Debt securities held to maturity, Due in one year or less, Fair Value	55,295
Debt securities held to maturity, Due from one to five years, Fair Value	162,153
Debt securities held to maturity, Due after five years through ten years, Fair Value	100,349
Debt securities held to maturity, Due after ten years, Fair Value	175,704
Securities held to maturity, Fair Value	$ 493,501	$ 512,983

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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Period Type:	instant

X

- References

No definition available.

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