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Variable Interest Entities Text Tag (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2010 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2010 | Mar. 31, 2007 | Mar. 31, 2017 | Dec. 30, 2010 | Mar. 31, 2008
Entity Information [Line Items] |  |  |  |  |  |  |  |
Variable Interest Entity, Funded Exposure, Debt Investment |  |  |  |  |  | $ 13,000 |  |
Variable Interest Entity, Funded Exposure, Equity Invesment |  |  |  |  |  | 407 |  |
% of Carver Statutory Trust I owned |  | 100.00% |  |  |  |  |  |
Variable Interest Entity, Rights Transferred |  |  |  |  |  | 90,000 |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  |  |  | 35,100 |  |
New Markets Tax Credit Award |  |  | $ 25,000 | $ 65,000 | $ 59,000 |  |  |
Proceeds from transfer of equity interest in VIEs | $ 6,700 |  |  |  |  |  |  |
Carver Statutory Trust 1 |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Variable Interest Entity, Funded Exposure, Debt Investment |  | $ 13,000 |  |  |  | 13,000 |  |
Variable Interest Entity, Funded Exposure, Equity Invesment |  | $ 400 |  |  |  | 400 |  |
Variable Interest Entity, Rights Transferred |  |  |  |  |  | 0 |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  |  |  | $ 0 |  |
CDE 10 |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Variable Interest Entity, Rights Transferred |  |  |  |  |  |  |  | $ 19,000
CDE 1-9, CDE 11-12 |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Variable Interest Entity, Rights Transferred |  |  |  |  |  |  |  | $ 40,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  |  |  |  | $ 7,800 |

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- Definition New Market Tax Credit Award + References No definition available. + Details
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- Definition % of Carver Statutory Trust I owned + References No definition available. + Details
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Balance Type: | na
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- Definition Variable Interest Entity, Funded Exposure, Debt Investment + References No definition available. + Details
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- Definition Variable Interest Entity, Funded Exposure, Equity Invesment + References No definition available. + Details
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- Definition Variable Interest Entity, Rights Transferred + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685 + Details
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