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Stockholders' Equity Stockholders' Equity Text tags (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2011 | Dec. 31, 1994 | Dec. 31, 2011 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2012 | Oct. 24, 1994
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax |  |  |  | $ 672,000 | $ 478,000 | $ (466,000) |  |
Common Stock, Shares, Issued |  |  |  | 3,697,364 |  |  | 3,697,264 | 2,314,375
Common Stock, Par or Stated Value Per Share |  |  |  | $ 0.01 |  |  | $ 0.01 | $ 0.01
Share Price |  |  |  |  |  |  |  | $ 10
Proceeds from Issuance of Common Stock |  | 21,500,000 |  |  |  |  |  |
Tangible Capital Required for Capital Adequacy to Tangible Assets |  |  |  | 1.50% |  |  |  |
Tier One Leverage Capital Required to be Well Capitalized to Average Assets |  |  |  | 3.00% |  |  |  |
Amount below deemed undercapitalized |  |  |  | 4.00% |  |  |  |
Minimum risk-based capital ratio |  |  |  | 8.00% |  |  |  |
OCC directive Tier 1 Leverage capital ratio |  |  |  | 9.00% |  |  |  |
OCC directive Total risk-based capital ratio |  |  |  | 13.00% |  |  |  |
Tier One Leverage Capital to Average Assets |  |  |  | 10.26% |  |  |  |
Capital to Risk Weighted Assets |  |  |  | 19.55% |  |  |  |
Tier One Risk Based Capital to Risk Weighted Assets |  |  |  | 16.99% |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock | 55,000,000 |  |  |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock | 51,400,000 |  |  |  |  |  |  |
Proceeds from Contributions from Parent | 37,000,000 |  | 7,000,000 |  |  |  |  |
Deferred Tax Assets, Net of Valuation Allowance |  |  |  | 26,800,000 |  |  |  |
Deferred Tax Asset Reduction |  |  |  | 4,700,000 |  |  |  |
Deferred Tax Assets, Net of Valuation Allowance, Current |  |  |  | 22,100,000 |  |  |  |
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax |  |  |  |  | 400,000 |  |  |
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax |  |  |  | $ 500,000 | $ 200,000 |  |  |

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- Definition The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 21 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6872113&loc=d3e27357-111563 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15 -Subparagraph 3a -IssueDate 2006-05-01 -Chapter 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 22 -IssueDate 2006-05-01 -Chapter 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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