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Derivatives (Derivatives Associated with Capital Markets Trading Activities) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013
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Customer Interest Rate Contracts [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | $ 1,775,287 | $ 1,477,632
Assets | 76,173 | 119,866
Liabilities | 7,103 | 1,327
Offsetting Upstream Interest Rate Contracts [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 1,775,287 | 1,477,632
Assets | 7,103 | 1,327
Liabilities | 76,173 | 119,866
Put Option [Member] | Short [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional |  | 2,500
Assets |  | 0
Liabilities |  | 2
Put Option [Member] | Long [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 10,000 | 2,500
Assets | 29 | 5
Liabilities | 0 | 0
Forwards And Futures Purchased [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 2,234,232 | 5,786,940
Assets | 1,738 | 7,541
Liabilities | 1,260 | 8,199
Forwards And Futures Sold [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 2,607,585 | 5,923,867
Assets | 2,277 | 8,090
Liabilities | $ 1,478 | $ 8,381

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 + Details
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Period Type: | instant