Summary of Delinquency Status of Loans by Portfolio Type (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 9,426		$ 1,957
60-89 Days Past Due	3,482		4,084
90 Days and Greater	10,794		5,110
Total Past Due	23,702		11,151
Current	684,696		647,128
Total Loans Outstanding	708,398		658,279
Loans >90 Days and Accruing		[1]		[1]
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	8,757		1,877
60-89 Days Past Due	3,482		159
90 Days and Greater	4,775		2,021
Total Past Due	17,014		4,057
Current	156,623		175,248
Total Loans Outstanding	173,637		179,305
Loans >90 Days and Accruing		[1]		[1]
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2
Total Past Due	2
Current	31,957		24,358
Total Loans Outstanding	31,959		24,358
Loans >90 Days and Accruing		[1]		[1]
Commercial real estate | Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Greater	5,491
Total Past Due	5,491
Current	152,548
Total Loans Outstanding	158,039
Loans >90 Days and Accruing		[1]
Commercial real estate | All other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	155,118
Total Loans Outstanding	155,118
Loans >90 Days and Accruing		[1]
Residential mortgage loans | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
60-89 Days Past Due			859
Total Past Due			859
Current	74,930		64,686
Total Loans Outstanding	74,930		65,545
Loans >90 Days and Accruing		[1]		[1]
Residential mortgage loans | Residential mortgage loans - single family
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	347		80
60-89 Days Past Due			1,050
90 Days and Greater			492
Total Past Due	347		1,622
Current	86,880		66,991
Total Loans Outstanding	87,227		68,613
Loans >90 Days and Accruing		[1]		[1]
Construction loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Greater			2,047
Total Past Due			2,047
Total Loans Outstanding			2,047
Loans >90 Days and Accruing		[1]		[1]
Land development loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	320
90 Days and Greater	528		550
Total Past Due	848		550
Current	26,640		25,088
Total Loans Outstanding	27,488		25,638
Loans >90 Days and Accruing		[1]		[1]
Real Estate | Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
60-89 Days Past Due			2,016
Total Past Due			2,016
Current			168,944
Total Loans Outstanding			170,960
Loans >90 Days and Accruing				[1]
Real Estate | All other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current			121,813
Total Loans Outstanding			121,813
Loans >90 Days and Accruing				[1]

[1] At June 30, 2012 the Company did not have any loans that were past due 90 days or more and still accruing interest.