Contractual Maturities of Available for Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, amortized cost	$ 74
Due after one year but within five years, amortized cost	61,376
Due after five years but within ten years, amortized cost	24,074
Due after ten years, amortized cost
Total, amortized cost	85,524
Due in one year or less, weighted average yield	1.17%
Due after one year but within five years, weighted average yield	2.00%
Due after five years but within ten years, weighted average yield	1.79%
Due after ten years, weighted average yield
Total, weighted average yield	1.94%
Due in one year or less, fair value	74
Due after one year but within five years, fair value	60,680
Due after five years but within ten years, fair value	24,028
Due after ten years, fair value
Fair value	84,782	68,598
GSE mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, amortized cost	74
Due after one year but within five years, amortized cost	47,822
Due after five years but within ten years, amortized cost	24,074
Due after ten years, amortized cost
Total, amortized cost	71,970
Due in one year or less, weighted average yield	1.17%
Due after one year but within five years, weighted average yield	1.96%
Due after five years but within ten years, weighted average yield	1.79%
Due after ten years, weighted average yield
Total, weighted average yield	1.90%
Fair value	71,244	52,285
Mortgage-backed securities issued by U.S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Due after one year but within five years, amortized cost	13,554
Due after ten years, amortized cost
Total, amortized cost	13,554
Due after one year but within five years, weighted average yield	2.16%
Due after ten years, weighted average yield
Total, weighted average yield	2.16%
Fair value	$ 13,538	$ 16,313