Loans and Leases Individually Evaluated for Impairment by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Average recorded investment, total	$ 15,584	$ 21,887
Interest income recognized, total	128	109
Cash basis interest recognized, total	136	99
Commercial Loan \| Multi-family
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance			487
Loans with no related allowance recorded for recorded investment			270
Average recorded investment, total	1,684	2,343
Interest income recognized, total	13
Cash basis interest recognized, total	13
Commercial Loan \| SBA
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance			26
Loans with no related allowance recorded for recorded investment			10
Commercial Loan \| Commercial and industrial
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance			50
Loans with no related allowance recorded for recorded investment			33
Commercial Loan \| Real estate mortgage
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance	3,526		4,951
Loans with no related allowance recorded for recorded investment	3,218		3,868
Average recorded investment, total	3,417	2,519
Interest income recognized, total	49	3
Cash basis interest recognized, total	57	3
Consumer Loan \| Real estate 1-4 family first mortgage
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance	8,612		10,765
Loans with no related allowance recorded for recorded investment	8,267		9,487
Average recorded investment, total	10,270	17,025
Interest income recognized, total	65	106
Cash basis interest recognized, total	65	96
Consumer Loan \| HELOC, home equity loans, and other consumer credit
Financing Receivable, Impaired [Line Items]
Loans with no allocated allowance for loan losses recorded for unpaid principal balance	213		248
Loans with no related allowance recorded for recorded investment	212		247
Average recorded investment, total	213
Interest income recognized, total	1
Cash basis interest recognized, total	1
Originated Loans
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, total	16,197		21,704
Recorded investment, total	15,264		18,946
Allowance for loan losses allocated	63		96
Originated Loans \| Commercial Loan \| Multi-family
Financing Receivable, Impaired [Line Items]
Loans with allocated allowance for loan losses recorded for unpaid principal balance	1,782		1,797
Loans with an allowance recorded for recorded investment	1,674		1,702
Allowance for loan losses allocated	37		60
Originated Loans \| Consumer Loan \| Real estate 1-4 family first mortgage
Financing Receivable, Impaired [Line Items]
Loans with allocated allowance for loan losses recorded for unpaid principal balance	2,064		3,378
Loans with an allowance recorded for recorded investment	1,893		3,327
Allowance for loan losses allocated	26		34
Originated Loans \| Consumer Loan \| HELOC, home equity loans, and other consumer credit
Financing Receivable, Impaired [Line Items]
Loans with allocated allowance for loan losses recorded for unpaid principal balance			2
Loans with an allowance recorded for recorded investment			2
Allowance for loan losses allocated			$ 2

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524

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