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Composition of Borrowings (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Federal funds purchased		$ 0		$ 0
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase		138,614		121,742
FHLB borrowings		65,000		90,000
Subordinated debt		15,464		15,464
Other debt		292		2,535
Total borrowings		$ 219,370		$ 229,741
Federal funds purchased	[1]	0.00%		0.00%
Retail	[1]	0.10%		0.13%
Retail
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase		$ 88,614		$ 71,742
Wholesale
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase		$ 50,000		$ 50,000
Wholesale Repurchase Agreements
Securities sold under agreements to repurchase:
Weighted average contractual rate	[1]	3.71%		3.71%
FHLB Borrowings
Securities sold under agreements to repurchase:
FHLB borrowings			$ 25,000
Weighted average contractual rate	[1]	4.03%		4.07%
[1] Weighted average contractual rate

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Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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