Organization and Summary of Significant Accounting Policies - Allowance for Loan and Lease Losses (Details) - Consumer	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Minimum
Allowance for loan and lease losses
Threshold period past due for charge-off	120 days	120 days
Maximum
Allowance for loan and lease losses
Threshold period past due for charge-off	180 days	180 days

Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration