Capital Requirements and Restrictions on Retained Earnings - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 PBI Bank	Dec. 31, 2013 PBI Bank	Oct. 31, 2012 Consent order	Jun. 24, 2011 Consent order	Mar. 31, 2014 Consent order Construction and development loans	Dec. 31, 2013 Consent order Construction and development loans	Jun. 24, 2011 Consent order Construction and development loans	Mar. 31, 2014 Consent order Non-owner occupied commercial real estate loans	Dec. 31, 2013 Consent order Non-owner occupied commercial real estate loans	Jun. 24, 2011 Consent order Non-owner occupied commercial real estate loans
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I leverage ratio, regulatory minimum	4.00%	4.00%	4.00%	4.00%	9.00%	9.00%
Total risk-based capital, regulatory minimum	8.00%	8.00%			12.00%	12.00%
Minimum substandard asset subject to risk position reduction						$ 1
Maximum concentration of loans to total risk based capital							75.00%	75.00%	75.00%	250.00%	250.00%	250.00%
Maximum asset growth rate, quarterly						5.00%
Maximum asset growth rate, annually						10.00%
Tier 1 leverage ratio	4.87%	4.95%	6.36%	6.28%
Total risk-based capital	10.93%	11.03%	11.50%