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Intangible Assets (Summary Of Gross Goodwill And Accumulated Impairment Losses And Write-Offs Detailed By Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill [Line Items] |  |  |  |
Gross goodwill | $ 341,938 | $ 334,237 | $ 341,938 | $ 334,237
Accumulated impairments | (114,123) | (114,123) | (114,123) | (114,123)
Accumulated divestiture related write-offs | (85,872) | (85,872) | (85,872) | (85,872)
Goodwill | 141,943 | 134,242 | 141,943 | 134,242
Additions | 0 | 0 |  |
Impairments | 0 | 0 |  |
Divestitures | 0 | 0 |  |
Net change in goodwill | 0 | 0 |  |
Non Strategic [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross goodwill | 199,995 | 199,995 | 199,995 | 199,995
Accumulated impairments | (114,123) | (114,123) | (114,123) | (114,123)
Accumulated divestiture related write-offs | (85,872) | (85,872) | (85,872) | (85,872)
Goodwill | 0 | 0 | 0 | 0
Additions | 0 | 0 |  |
Impairments | 0 | 0 |  |
Divestitures | 0 | 0 |  |
Net change in goodwill | 0 | 0 |  |
Regional Banking [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross goodwill | 43,939 | 36,238 | 43,939 | 36,238
Accumulated impairments | 0 | 0 | 0 | 0
Accumulated divestiture related write-offs | 0 | 0 | 0 | 0
Goodwill | 43,939 | 36,238 | 43,939 | 36,238
Additions | 0 | 0 |  |
Impairments | 0 | 0 |  |
Divestitures | 0 | 0 |  |
Net change in goodwill | 0 | 0 |  |
Capital Markets [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross goodwill | 98,004 | 98,004 | 98,004 | 98,004
Accumulated impairments | 0 | 0 | 0 | 0
Accumulated divestiture related write-offs | 0 | 0 | 0 | 0
Goodwill | 98,004 | 98,004 | 98,004 | 98,004
Additions | 0 | 0 |  |
Impairments | 0 | 0 |  |
Divestitures | 0 | 0 |  |
Net change in goodwill | $ 0 | $ 0 |  |

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