| Component: (Network and Table) | |
|---|---|
| Network | 122 - Disclosure - Mortgage Debt (Tables) (http://www.presrealty.com/role/MortgageDebtTables) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000731245 (http://www.sec.gov/CIK) |
| Debt Disclosure [Abstract] | Period [Axis] | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2015-01-01 - 2015-12-31 | ||||||||||||||||||||||||||||||||
Debt Disclosure [Abstract] | ||||||||||||||||||||||||||||||||
Schedule of Maturities of Long-term Debt [Table Text Block] | Maturities of Mortgage for the next five years are as follows:
|