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Investment Securities Amortized Cost and Estimated Fair Value (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items] |  |
available for sale, at fair value | $ 90,833 | $ 85,106
HTM Estimated Fair Value | 11,091 | 11,774
Total securities amortized cost | 100,953 | 95,821
Total securities gross unrealized gain | 1,253 | 1,175
Total securities gross unrealized losses | (282) | (116)
Total securities Estimated Fair Value | 101,924 | 96,880
Held-to-maturity Securities | 10,401 | 11,081
Government National Mortgage Association |  |
Schedule of Available-for-sale Securities [Line Items] |  |
HTM Amortized Cost | 6,202 | 6,659
HTM Gross Unrealized Gains | 476 | 473
HTM Gross Unrealized Losses | 0 | 0
HTM Estimated Fair Value | 6,678 | 7,132
Federal Home Loan Mortgage Corporation |  |
Schedule of Available-for-sale Securities [Line Items] |  |
HTM Amortized Cost | 2,637 | 2,794
HTM Gross Unrealized Gains | 128 | 134
HTM Gross Unrealized Losses | 0 | 0
HTM Estimated Fair Value | 2,765 | 2,928
Federal National Mortgage Association |  |
Schedule of Available-for-sale Securities [Line Items] |  |
HTM Amortized Cost | 1,562 | 1,628
HTM Gross Unrealized Gains | 86 | 86
HTM Gross Unrealized Losses | 0 | 0
HTM Estimated Fair Value | 1,648 | 1,714
Held-to-maturity securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
HTM Amortized Cost | 10,401 | 11,081
HTM Gross Unrealized Gains | 690 | 693
HTM Gross Unrealized Losses | 0 | 0
HTM Estimated Fair Value | 11,091 | 11,774
Available-for-sale Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 90,552 | 84,740
AFS Gross Unrealized Gains | 563 | 482
AFS Gross Unrealized Losses | (282) | (116)
available for sale, at fair value | 90,833 | 85,106
Total mortgage-backed securities AFS |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 44,090 | 45,782
AFS Gross Unrealized Gains | 352 | 327
AFS Gross Unrealized Losses | (241) | (25)
available for sale, at fair value | 44,201 | 46,084
Government National Mortgage Association |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 27,138 | 31,100
AFS Gross Unrealized Gains | 148 | 269
AFS Gross Unrealized Losses | (207) | (23)
available for sale, at fair value | 27,079 | 31,346
Federal Home Loan Mortgage Corporation |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 8,180 | 7,468
AFS Gross Unrealized Gains | 44 | 8
AFS Gross Unrealized Losses | (34) | (1)
available for sale, at fair value | 8,190 | 7,475
Federal National Mortgage Association |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 6,694 | 7,214
AFS Gross Unrealized Gains | 148 | 50
AFS Gross Unrealized Losses | 0 | (1)
available for sale, at fair value | 6,842 | 7,263
Other |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 51 | 0
AFS Gross Unrealized Gains | 0 | 0
AFS Gross Unrealized Losses | 0 | 0
available for sale, at fair value | 51 | 0
Small Business Association |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 2,027 |
AFS Gross Unrealized Gains | 12 |
AFS Gross Unrealized Losses | 0 |
available for sale, at fair value | 2,039 |
US Government Agency Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 30,976 | 23,176
AFS Gross Unrealized Gains | 64 | 91
AFS Gross Unrealized Losses | (40) | (63)
available for sale, at fair value | 31,000 | 23,204
US Government Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 3,104 | 3,356
AFS Gross Unrealized Gains | 5 | 6
AFS Gross Unrealized Losses | (1) | (1)
available for sale, at fair value | 3,108 | 3,361
Corporate Bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 1,897 | 1,890
AFS Gross Unrealized Gains | 43 | 58
AFS Gross Unrealized Losses | 0 | 0
available for sale, at fair value | 1,940 | 1,948
Other |  |
Schedule of Available-for-sale Securities [Line Items] |  |
AFS Amortized Cost | 10,485 | 10,536
AFS Gross Unrealized Gains | 99 | 0
AFS Gross Unrealized Losses | 0 | (27)
available for sale, at fair value | $ 10,584 | $ 10,509

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