Note Related party transactions (Impact on the results of operations of transactions between the Corporation and PRLP 2011 Holdings, LLC) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Loans \| PRLP 2011 Holding, LLC
Related Party Transaction [Line Items]
Interest Income Related Party	$ 11	$ 62

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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