Investment Securities - Schedule of Debt Securities by Contractual Maturity (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Total amortized cost basis	$ 10,615
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Total fair value basis	10,615	9,302
Available for Sale
Total amortized cost basis	131,341
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Securities available for sale, at fair value	131,157
Municipal And Corporate Bonds
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized cost within 1 year	8,027
Amortized cost, after year 1, but within 5 years	2,588
Total amortized cost basis	10,615
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair vale, within 1 year	8,027
Fair value, after year 1, but within 5 years	2,588
Total fair value basis	10,615
Available for Sale
Amortized cost within 1 year	999
Amortized cost, after year 1, but within 5 years	2,024
Total amortized cost basis	3,023
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair value, within 1 year	1,006
Fair value, after 1 year but within 5 years	2,069
Securities available for sale, at fair value	3,075
Agency
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized cost within 1 year	0
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair vale, within 1 year	0
Available for Sale
Amortized cost within 1 year	126,711
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair value, within 1 year	126,463
Non-agency
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized cost, after year 1, but within 5 years	0
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair value, after year 1, but within 5 years	0
Available for Sale
Amortized cost, after year 1, but within 5 years	1,607
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Fair value, after 1 year but within 5 years	$ 1,619