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Investment Securities (Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses) (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014
Schedule of Investments [Line Items] |  |
Less than 12 months, Fair Value | $ 440,162 | $ 758,304
Less than 12 months, Unrealized Losses | (1,729) | (5,555)
12 months or longer, Fair Value | 468,499 | 1,053,424
12 months or longer, Unrealized Losses | (8,639) | (37,057)
Total Fair Value | 908,661 | 1,811,728
Total Unrealized Losses | (10,368) | (42,612)
Government Agency Issued Collateralized Mortgage Obligations ("CMO") |  |
Schedule of Investments [Line Items] |  |
Less than 12 months, Fair Value | 370,165 | 724,834
Less than 12 months, Unrealized Losses | (1,487) | (5,113)
12 months or longer, Fair Value | 435,331 | 949,556
12 months or longer, Unrealized Losses | (7,720) | (34,886)
Total Fair Value | 805,496 | 1,674,390
Total Unrealized Losses | (9,207) | (39,999)
Government Agency Issued Mortgage-Backed Securities ("MBS") |  |
Schedule of Investments [Line Items] |  |
Less than 12 months, Fair Value | 69,997 | 32,621
Less than 12 months, Unrealized Losses | (242) | (244)
12 months or longer, Fair Value | 32,538 | 103,858
12 months or longer, Unrealized Losses | (458) | (2,137)
Total Fair Value | 102,535 | 136,479
Total Unrealized Losses | (700) | (2,381)
Total debt securities |  |
Schedule of Investments [Line Items] |  |
Less than 12 months, Fair Value | 440,162 | 757,455
Less than 12 months, Unrealized Losses | (1,729) | (5,357)
12 months or longer, Fair Value | 467,869 | 1,053,414
12 months or longer, Unrealized Losses | (8,178) | (37,023)
Total Fair Value | 908,031 | 1,810,869
Total Unrealized Losses | (9,907) | (42,380)
Equity |  |
Schedule of Investments [Line Items] |  |
Less than 12 months, Fair Value | 0 | 849
Less than 12 months, Unrealized Losses | 0 | (198)
12 months or longer, Fair Value | 630 | 10
12 months or longer, Unrealized Losses | (461) | (34)
Total Fair Value | 630 | 859
Total Unrealized Losses | $ (461) | $ (232)

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- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of unrealized loss on securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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