Recorded Investment in Loans Modified in TDRs (Detail) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011		Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	$ 3,429		$ 11,177
Software | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	381	[1]	941	[1]
Hardware | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	801		2,674
Premium wine | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period			1,993
Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	3,429		7,855
Commercial loans | Other loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	2,247		2,247
Consumer loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period			3,322
Consumer loans | Other loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period			$ 3,322

[1] During the three and nine months ended September 30, 2011, we had partial charge-offs of $0.6 million on loans classified as TDRs.