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Intangible Assets (Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount |  | $ 72,037 | $ 72,270
Accumulated Amortization |  | (52,252) | (51,253)
Net Carrying Value |  | 19,785 | 21,017
Core deposit intangibles |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount |  | 16,850 | 16,850
Accumulated Amortization |  | (5,199) | (4,721)
Net Carrying Value |  | 11,651 | 12,129
Customer lists |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount |  | 54,865 | 54,865
Accumulated Amortization |  | (47,053) | (46,302)
Net Carrying Value |  | 7,812 | 8,563
Other |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1] | 322 | 555
Accumulated Amortization | [1] | 0 | (230)
Net Carrying Value | [1] | $ 322 | $ 325
[1] | Balance at March 31, 2017 relates to state banking licenses and are not subject to amortization .

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