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Investment Securities Amortized Cost and Estimated Fair Value (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Fair Value | $ 116,051 | $ 85,106 |
Held to maturity securities fair value | 9,629 |  | 10,737
Total securities amortized cost | 124,052 | 95,821 |
Total securities gross unrealized gain | 1,918 | 1,175 |
Total securities gross unrealized losses | (290) | (116) |
Total securities Estimated Fair Value | 125,680 | 96,880 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
HTM Amortized Cost | 9,043 | 11,081 |
HTM Gross Unrealized Gains | 586 | 693 |
HTM Gross Unrealized Losses | 0 | 0 |
Held to maturity securities fair value | 9,629 | 11,774 |
Held-to-maturity Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
HTM Amortized Cost | 9,043 | 11,081 |
HTM Gross Unrealized Gains | 586 | 693 |
HTM Gross Unrealized Losses | 0 | 0 |
Held-to-maturity Securities, Fair Value Disclosure |  | 11,774 |
Held to maturity securities fair value | 9,629 |  |
Government National Mortgage Association |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
HTM Amortized Cost | 5,335 | 6,659 |
HTM Gross Unrealized Gains | 404 | 473 |
HTM Gross Unrealized Losses | 0 | 0 |
Held to maturity securities fair value | 5,739 | 7,132 |
Federal Home Loan Mortgage Corporation |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
HTM Amortized Cost | 2,387 | 2,794 |
HTM Gross Unrealized Gains | 103 | 134 |
HTM Gross Unrealized Losses | 0 | 0 |
Held to maturity securities fair value | 2,490 | 2,928 |
Federal National Mortgage Association |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
HTM Amortized Cost | 1,321 | 1,628 |
HTM Gross Unrealized Gains | 79 | 86 |
HTM Gross Unrealized Losses | 0 | 0 |
Held to maturity securities fair value | 1,400 | 1,714 |
Available-for-sale Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 115,009 | 84,740 |
AFS Gross Unrealized Gains | 1,332 | 482 |
AFS Gross Unrealized Losses | (290) | (116) |
AFS Fair Value | 116,051 |  |
Total mortgage-backed securities AFS |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 43,459 | 45,833 |
AFS Gross Unrealized Gains | 897 | 327 |
AFS Gross Unrealized Losses | (104) | (25) |
AFS Fair Value | 44,252 | 46,135 |
Government National Mortgage Association |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 23,164 | 31,100 |
AFS Gross Unrealized Gains | 676 | 269 |
AFS Gross Unrealized Losses | 0 | (23) |
AFS Fair Value | 23,840 | 31,346 |
Federal Home Loan Mortgage Corporation |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 16,059 | 7,468 |
AFS Gross Unrealized Gains | 104 | 8 |
AFS Gross Unrealized Losses | (104) | (1) |
AFS Fair Value | 16,059 | 7,475 |
Federal National Mortgage Association |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 4,186 | 7,214 |
AFS Gross Unrealized Gains | 117 | 50 |
AFS Gross Unrealized Losses | 0 | (1) |
AFS Fair Value | 4,303 | 7,263 |
Other |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 50 | 51 |
AFS Gross Unrealized Gains | 0 | 0 |
AFS Gross Unrealized Losses | 0 | 0 |
AFS Fair Value | 50 | 51 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Gross Unrealized Losses |  | (25) |
US Government Agency Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 44,363 | 23,176 |
AFS Gross Unrealized Gains | 139 | 91 |
AFS Gross Unrealized Losses | (177) | (63) |
AFS Fair Value | 44,325 | 23,204 |
US Government Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost |  | 3,356 |
AFS Gross Unrealized Gains |  | 6 |
AFS Gross Unrealized Losses |  | (1) |
AFS Fair Value |  | 3,361 |
Corporate Bond Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost |  | 1,890 |
AFS Gross Unrealized Gains |  | 58 |
AFS Gross Unrealized Losses |  | 0 |
AFS Fair Value |  | 1,948 |
Small Business Association [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 1,919 |  |
AFS Gross Unrealized Gains | 45 |  |
AFS Gross Unrealized Losses | 0 |  |
AFS Fair Value | 1,964 |  |
Asset-backed Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 15,268 |  |
AFS Gross Unrealized Gains | 251 |  |
AFS Gross Unrealized Losses | 0 |  |
AFS Fair Value | 15,519 |  |
Other |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Amortized Cost | 10,000 | 10,485 |
AFS Gross Unrealized Gains | 0 | 0 |
AFS Gross Unrealized Losses | (9) | (27) |
AFS Fair Value | 9,991 | 10,458 |
Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
AFS Fair Value | $ 116,051 | $ 85,106 |

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized 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 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -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 -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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