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Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loan (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Allowance for loan losses:
Beginning Balance	$ 10,803	$ 8,859	$ 10,338	$ 8,651
Charge-offs	(174)	(790)	(539)	(1,473)
Recoveries	49	352	129	386
Provisions	750	1,201	1,500	2,058
Ending balance	11,428	9,622	11,428	9,622
Commercial [Member]
Allowance for loan losses:
Beginning Balance	2,420	1,961	2,321	2,008
Charge-offs	(3)	(29)	(40)	(376)
Recoveries	3	1	64	1
Provisions	15	268	90	568
Ending balance	2,435	2,201	2,435	2,201
Real Estate Commercial [Member]
Allowance for loan losses:
Beginning Balance	3,087	2,473	3,037	2,394
Charge-offs	(30)	(404)	(79)	(432)
Recoveries	5	269	6	269
Provisions	128	337	226	444
Ending balance	3,190	2,675	3,190	2,675
Real Estate Residential [Member]
Allowance for loan losses:
Beginning Balance	3,909	3,248	3,690	3,135
Charge-offs	(35)	(270)	(234)	(510)
Recoveries	3	35	8	38
Provisions	150	445	563	795
Ending balance	4,027	3,458	4,027	3,458
Consumer [Member]
Allowance for loan losses:
Beginning Balance	1,387	1,177	1,290	1,114
Charge-offs	(106)	(87)	(186)	(155)
Recoveries	38	47	51	78
Provisions	457	151	621	251
Ending balance	$ 1,776	$ 1,288	$ 1,776	$ 1,288

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



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Amount of direct write-downs of financing receivables charged against the allowance.

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