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Financial Instruments with Off-Balance-Sheet Risk - Contractual Amounts Represent Credit Risk (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Commitments to extend credit:
Total Commitments to extend credit	$ 83,397
Future Loan Commitments [Member]
Commitments to extend credit:
Total Commitments to extend credit	15,526
Home Equity Lines of Credit [Member]
Commitments to extend credit:
Total Commitments to extend credit	27,708
Unused Lines of Credit [Member]
Commitments to extend credit:
Total Commitments to extend credit	36,871
Undisbursed Construction Loans [Member]
Commitments to extend credit:
Total Commitments to extend credit	2,174
Financial Standby Letters of Credit [Member]
Commitments to extend credit:
Total Commitments to extend credit	$ 1,118