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Fair Value (Investment securities available-for-sale classified as level 3) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] | Mar. 31, 2014 Other Debt Obligations [Member] Fair Value, Inputs, Level 3 [Member]
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Amortized Cost | $ 1,437,106 | $ 1,575,043 |  |  | $ 20,000
Unrealized Gains (Losses) |  |  |  |  | 53
Investment securities available-for-sale, at fair value | $ 1,455,685 | $ 1,588,425 | $ 20,053 | $ 19,680 | $ 20,053
Available for sale - Weighted Average Yield | 2.74% | 2.89% |  |  | 3.50%

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition Amount of unrealized gain (loss) on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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