Loans - Financing Receivables Credit Quality Indicators (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	$ 128,382	$ 157,270
Non-owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	30,792	36,417
Owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	22,256	27,898
Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	4,639	5,442
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	18,187	25,994
Single-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	15,425	18,214
Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	22,900	27,163
Home equity lines of credit [Member] | Originated for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	10,800	12,283
Home equity lines of credit [Member] | Purchased for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	2,345	2,638
Other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,038	1,221
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	29,819	34,758
Not Rated [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	331	365
Not Rated [Member] | Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	121	954
Not Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	389	432
Not Rated [Member] | Single-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	15,381	17,478
Not Rated [Member] | Home equity lines of credit [Member] | Originated for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	10,734	12,126
Not Rated [Member] | Home equity lines of credit [Member] | Purchased for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,825	2,182
Not Rated [Member] | Other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,038	1,221
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	67,286	80,794
Pass [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	21,865	22,159
Pass [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	18,555	22,526
Pass [Member] | Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,013	1,123
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	13,568	19,591
Pass [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	12,285	15,395
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	14,295	16,239
Special Mention [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	3,018	5,717
Special Mention [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,629	3,474
Special Mention [Member] | Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	434
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	2,960	2,062
Special Mention [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	5,815	4,539
Special Mention [Member] | Home equity lines of credit [Member] | Purchased for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	439	447
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	16,982	25,072
Substandard [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	5,578	8,176
Substandard [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	2,072	1,898
Substandard [Member] | Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	3,071	3,365
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	1,270	3,909
Substandard [Member] | Single-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	44	736
Substandard [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	4,800	6,822
Substandard [Member] | Home equity lines of credit [Member] | Originated for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	66	157
Substandard [Member] | Home equity lines of credit [Member] | Purchased for portfolio [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total	81	9
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total		407
Doubtful [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Total		$ 407