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Securities - Summary of Amortized Cost and Estimated Fair Values of Securities Held for Investment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 11,269
Gross Unrealized Gains	89
Gross Unrealized Losses	(7)
Estimated Fair Value	11,351
Mortgage-backed securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	575
Gross Unrealized Gains	41
Gross Unrealized Losses
Estimated Fair Value	616
States and political subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,694
Gross Unrealized Gains	48
Gross Unrealized Losses	(7)
Estimated Fair Value	$ 10,735

X

- Definition

This item represents the excess of amortized cost basis over fair value of securities in a gain position and which are categorized as held-to-maturity.

+ References

No definition available.

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This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized as held-to-maturity.

+ References

No definition available.

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- Definition

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

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Fair value of investments in debt securities classified as held-to-maturity.

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