Long-Term Lease Obligations	12 Months Ended
Dec. 31, 2017
Leases [Abstract]
Long-Term Lease Obligations	LONG-TERM LEASE OBLIGATIONS During 2016 and 2017, the Company purchased the land underlying Olney, Beacon Center and Southdale - See Note 3. As a result, at December 31, 2017, no properties are subject to noncancelable long-term leases which apply to underlying land. Reflected in the accompanying consolidated financial statements is minimum ground rent expense of $10,500, $159,000, $176,000, for the years ended December 31, 2017, 2016, and 2015, respectively. Flagship Center consists of two developed out parcels that are part of a larger adjacent community shopping center formerly owned by the Saul Organization and sold to an affiliate of a tenant in 1991. The Company has a 90-year ground leasehold interest which commenced in September 1991 with a minimum rent of one dollar per year. Countryside shopping center was acquired in February 2004. Because of certain land use considerations, approximately 3.4% of the underlying land is held under a 99-year ground lease. The lease requires the Company to pay minimum rent of one dollar per year as well as its pro-rata share of the real estate taxes. The Company’s corporate headquarters space is leased by a member of the Saul Organization. The lease commenced in March 2002, and expires in February 2022. The Company and the Saul Organization entered into a Shared Services Agreement whereby each party pays an allocation of total rental payments based on a percentage proportionate to the number of employees employed by each party. The Company’s rent expense for the years ended December 31, 2017, 2016, and 2015 was $774,700, $843,300, and $904,900, respectively. Expenses arising from the lease are included in general and administrative expense (see Note 9 – Related Party Transactions).

LONG-TERM LEASE OBLIGATIONS

During 2016 and 2017, the Company purchased the land underlying Olney, Beacon Center and Southdale - See Note 3. As a result, at December 31, 2017, no properties are subject to noncancelable long-term leases which apply to underlying land. Reflected in the accompanying consolidated financial statements is minimum ground rent expense of $10,500, $159,000, $176,000, for the years ended December 31, 2017, 2016, and 2015, respectively.

Flagship Center consists of two developed out parcels that are part of a larger adjacent community shopping center formerly owned by the Saul Organization and sold to an affiliate of a tenant in 1991. The Company has a 90-year ground leasehold interest which commenced in September 1991 with a minimum rent of one dollar per year. Countryside shopping center was acquired in February 2004. Because of certain land use considerations, approximately 3.4% of the underlying land is held under a 99-year ground lease. The lease requires the Company to pay minimum rent of one dollar per year as well as its pro-rata share of the real estate taxes.

The Company’s corporate headquarters space is leased by a member of the Saul Organization. The lease commenced in March 2002, and expires in February 2022. The Company and the Saul Organization entered into a Shared Services Agreement whereby each party pays an allocation of total rental payments based on a percentage proportionate to the number of employees employed by each party. The Company’s rent expense for the years ended December 31, 2017, 2016, and 2015 was $774,700, $843,300, and $904,900, respectively. Expenses arising from the lease are included in general and administrative expense (see Note 9 – Related Party Transactions).