Summary of Loans Modified in Troubled Debt Restructurings ("TDRs") by Portfolio Segment and Class of Financing Receivables (Detail) (USD $) In Thousands	Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	$ 34,283
Software | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	2,322	[1]
Hardware | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	3,880
Premium wine | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	1,993
Other | Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	4,384
Commercial loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	12,579
Other | Consumer loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	3,322
Consumer loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	21,704
Consumer loans | Real estate secured loans
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs	$ 18,382

[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.