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Business Segment Information (Amounts Of Consolidated Revenue, Expense, Tax And Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Net interest income | $ 189,708 | $ 172,074
Provision/(provision credit) for loan losses | (1,000) | 3,000
Noninterest income | 116,939 | 134,305
Noninterest expense | 222,205 | 226,927
Income/(loss) before income taxes | 85,442 | 76,452
Provision/(benefit) for income taxes | 27,054 | 24,239
Net income/(loss) | 58,388 | 52,213
Average assets | 28,806,106 | 26,618,694
Regional Banking [Member] |  |
Segment Reporting Information [Line Items] |  |
Net interest income | 193,389 | 172,312
Provision/(provision credit) for loan losses | 3,098 | 14,767
Noninterest income | 58,976 | 59,276
Noninterest expense | 148,065 | 145,399
Income/(loss) before income taxes | 101,202 | 71,422
Provision/(benefit) for income taxes | 36,623 | 25,407
Net income/(loss) | 64,579 | 46,015
Average assets | 17,955,319 | 15,945,192
Fixed Income [Member] |  |
Segment Reporting Information [Line Items] |  |
Net interest income | 1,151 | 2,667
Noninterest income | 50,822 | 67,122
Noninterest expense | 48,685 | 58,623
Income/(loss) before income taxes | 3,288 | 11,166
Provision/(benefit) for income taxes | 1,024 | 3,892
Net income/(loss) | 2,264 | 7,274
Average assets | 1,875,708 | 2,269,678
Corporate [Member] |  |
Segment Reporting Information [Line Items] |  |
Net interest income | (14,100) | (14,363)
Noninterest income | 5,476 | 5,723
Noninterest expense | 16,880 | 13,461
Income/(loss) before income taxes | (25,504) | (22,101)
Provision/(benefit) for income taxes | (13,093) | (11,246)
Net income/(loss) | (12,411) | (10,855)
Average assets | 7,359,015 | 6,362,224
Non Strategic [Member] |  |
Segment Reporting Information [Line Items] |  |
Net interest income | 9,268 | 11,458
Provision/(provision credit) for loan losses | (4,098) | (11,767)
Noninterest income | 1,665 | 2,184
Noninterest expense | 8,575 | 9,444
Income/(loss) before income taxes | 6,456 | 15,965
Provision/(benefit) for income taxes | 2,500 | 6,186
Net income/(loss) | 3,956 | 9,779
Average assets | $ 1,616,064 | $ 2,041,600

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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