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Intangible Assets (Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 99,337 |  | $ 72,270
Accumulated Amortization |  | (54,216) |  | (51,253)
Net Carrying Value |  | 45,121 |  | 21,017
Core deposit intangibles |  |  |  |
Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 16,850 |  | 16,850
Accumulated Amortization |  | (5,677) |  | (4,721)
Net Carrying Value |  | 11,173 |  | 12,129
Customer Relationships |  |  |  |
Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 76,865 | [1] | 54,865
Accumulated Amortization |  | (48,274) | [1] | (46,302)
Net Carrying Value |  | 28,591 | [1] | 8,563
Other |  |  |  |
Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | [2] | 5,622 | [1] | 555
Accumulated Amortization | [2] | (265) | [1] | (230)
Net Carrying Value | [2] | 5,357 | [1] | 325
State banking licenses |  |  |  |
Intangible Assets [Line Items] |  |  |  |
Net Carrying Value |  | $ 322 |  | $ 322
[1] | 2017 increase associated with the Coastal acquisition.
[2] | Balance primarily includes noncompete covenants, as well as $322 thousand related to state banking licenses not subject to amortization.

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