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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment Securities [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 127
Debt securities available for sale, Due from one to five years, Amortized Cost	149,249
Debt securities available for sale, Due after five years through ten years, Amortized Cost	277,147
Debt securities available for sale, Due after ten years, Amortized Cost	117,469
Debt securities available for sale, Amortized Cost	543,992
Debt securities available for sale, Due in one year or less, Fair Value	127
Debt securities available for sale, Due from one to five years, Fair Value	149,428
Debt securities available for sale, Due after five years through ten years, Fair Value	274,529
Debt securities available for sale, Due after ten years, Fair Value	115,842
Debt securities available for sale, Fair Value	539,926
Debt securities held to maturity, Due in one year or less, Amortized Cost	48,132
Debt securities held to maturity, Due from one to five years, Amortized Cost	176,150
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	93,849
Debt securities held to maturity, Due after ten years, Amortized Cost	225,207
Securities held to maturity, Amortized Cost	543,338	$ 485,717
Debt securities held to maturity, Due in one year or less, Fair Value	48,188
Debt securities held to maturity, Due from one to five years, Fair Value	177,962
Debt securities held to maturity, Due after five years through ten years, Fair Value	92,396
Debt securities held to maturity, Due after ten years, Fair Value	221,445
Securities held to maturity, Fair Value	$ 539,991	$ 490,064

X

- 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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Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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X

- 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=27724398&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=27724398&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=27724398&loc=d3e27232-111563

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration