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Intangible Assets (Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 244,137 | $ 72,270
Accumulated Amortization | (59,748) | (51,253)
Net Carrying Value | 184,389 | 21,017
Core deposit intangibles |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 160,650 | 16,850
Accumulated Amortization | (8,176) | (4,721)
Net Carrying Value | 152,474 | 12,129
Customer Relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 77,865 | 54,865
Accumulated Amortization | (50,777) | (46,302)
Net Carrying Value | 27,088 | 8,563
Other |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,622 | 555
Accumulated Amortization | (795) | (230)
Net Carrying Value | $ 4,827 | $ 325

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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