Income Taxes (Details Textual) (USD $)	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013
Income Tax [Line Items]
Real Estate Investment Trust Taxable Income (Loss)	$ 80,000	$ 812,000
Real Estate Investment Trust Taxable Income Loss Per Share	$ 0.02	$ 0.22

Represents the real estate investment trust taxable income (loss) per share during the period.

No definition available.

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Namespace Prefix:	pdnlb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration