Notes Receivable	12 Months Ended
Dec. 31, 2017
Receivables [Abstract]
Notes Receivable	Notes Receivable Point Street Apartments On October 15, 2015, the Company agreed to invest up to $28.2 million in the Point Street Apartments project in the Harbor Point area of Baltimore, Maryland. Point Street Apartments is an estimated $98.0 million development project with plans for a 17-story building comprised of 289 residential units and 18,000 square feet of street-level retail space. Beatty Development Group (“BDG”) is the developer of the project and has engaged the Company to serve as construction general contractor. Point Street Apartments is scheduled to open in the first quarter of 2018; however, management can provide no assurances that Point Street Apartments will open on the anticipated timeline or be completed at the anticipated cost. BDG secured a senior construction loan of up to $67.0 million to fund the development and construction of Point Street Apartments on November 10, 2016. The Company has agreed to guarantee $25.0 million of the senior construction loan in exchange for the option to purchase up to an 88% controlling interest in Point Street Apartments upon completion of the project as follows: (i) an option to purchase a 79% indirect interest in Point Street Apartments for $27.3 million, exercisable within one year from the project’s completion (the “First Option”) and (ii) provided that the Company has exercised the First Option, an option to purchase an additional 9% indirect interest in Point Street Apartments for $3.1 million, exercisable within 27 months from the project’s completion (the “Second Option”). The Company currently has a $2.1 million letter of credit for the guarantee of the senior construction loan. The Company’s investment in the Point Street Apartments project is in the form of a loan under which BDG may borrow up to $28.2 million (the “BDG loan”). Interest on the BDG loan accrues at 8.0% per annum and matures on the earliest of: (i) November 1, 2018, which may be extended by BDG under two one-year extension options, (ii) the maturity date or earlier termination of the senior construction loan, or (iii) the date the Company exercises the Second Option as described further below. In the event the Company exercises the First Option, BDG is required to pay down the outstanding BDG loan in full, with the difference between the BDG loan and $28.2 million applied to the senior construction loan. In the event the Company exercises the Second Option, BDG is required to simultaneously repay any remaining amounts outstanding under the BDG loan, with any excess proceeds received from the exercise of the Second Option applied against the senior construction loan. In the event the Company does not exercise either the First Option or the Second Option, the interest rate on the BDG loan will automatically be reduced to the interest rate on the senior construction loan for the remaining term of the BDG loan. As of December 31, 2017 and 2016, the Company had funded $22.4 million and $20.6 million, respectively, under the BDG loan and for the years ended December 31, 2017 and 2016, the Company recognized $1.7 million and $1.2 million, respectively, of interest income on the BDG loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note. Management has concluded that this entity is a VIE. Because BDG is the developer of Point Street Apartments, the Company does not have the power to direct the activities of the project that most significantly impact its performance, nor is the Company the party most closely associated with the project. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements. Annapolis Junction On April 21, 2016, the Company entered into a note receivable with a maximum principal balance of $48.1 million in the Annapolis Junction residential component of the Annapolis Junction Town Center project in Maryland (“Annapolis Junction”). Annapolis Junction is an estimated $106.0 million mixed-use development project with plans for 416 residential units., It is part of a mixed-use development project that is also planned to have 17,000 square feet of retail space and a 150-room hotel. Annapolis Junction Apartments Owner, LLC (“AJAO”) is the developer of the residential component and has engaged the Company to serve as construction general contractor for the residential component. Portions of Annapolis Junction opened during the third and fourth quarters of 2017, and the remaining portions are scheduled to open during the first quarter of 2018; however, management can provide no assurances that Annapolis Junction will open on the anticipated timeline or at the anticipated cost. AJAO secured a senior construction loan of up to $60.0 million to fund the development and construction of Annapolis Junction's residential component on September 30, 2016. The Company has agreed to guarantee up to $25.0 million of the senior construction loan in exchange for the option to purchase up to an 88% controlling interest in Annapolis Junction upon completion of the project as follows: (i) an option to purchase an 80% indirect interest in Annapolis Junction's residential component for the lesser of the seller’s budgeted or actual cost, exercisable within one year from the project’s completion (the “First Option”) and (ii) provided that the Company has exercised the First Option, an option to purchase an additional 8% indirect interest in Annapolis Junction for the lesser of the seller’s actual or budgeted cost, exercisable within 27 months from the project’s completion (the “Second Option”). The Company’s investment in the Annapolis Junction project is in the form of a loan under which AJAO may borrow up to $48.1 million, including a $6.0 million interest reserve (the “AJAO loan”). Interest on the AJAO loan accrues at 10.0% per annum and matures on the earliest of: (i) December 21, 2020, which may be extended by AJAO under two one-year extension options, (ii) the maturity date or earlier termination of the senior construction loan, or (iii) the date the Company exercises the Second Option as described further below. In the event that the Company exercises the First Option, AJAO is required to simultaneously pay down both the senior construction loan and the AJAO loan by 80%, at which time the interest rate on the AJAO loan will automatically be reduced to the interest rate on the senior construction loan. In the event the Company exercises the Second Option, AJAO is required to simultaneously repay any remaining amounts outstanding under the AJAO loan, with any excess proceeds received from the exercise of the Second Option applied against the remaining balance of the senior construction loan. In the event that the Company does not exercise either the First Option or the Second Option, the interest rate on the AJAO loan will automatically be reduced to the interest rate on the senior construction loan for the remaining term of the AJAO loan. The balance on the Annapolis Junction note was $43.0 million and $38.9 million as of December 31, 2017 and 2016, respectively. During the years ended December 31, 2017 and 2016, the Company recognized $4.1 million and $2.0 million, respectively, of interest income on the note. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note. Management has concluded that this entity is a VIE. Because AJAO is the developer of Annapolis Junction, the Company does not have the power to direct the activities of the project that most significantly impact its performance, nor is the Company the party most closely associated with the project. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements. North Decatur Square On May 15, 2017, the Company invested in the development of an estimated $34.0 million Whole Foods anchored center located in Decatur, Georgia. The Company's investment is in the form of a mezzanine loan of up to $21.8 million to the developer, North Decatur Square Holdings, LLC ("NDSH"). The mezzanine loan bears interest at an annual rate of 15%. The note matures on the earliest of (i) May 15, 2022, (ii) the maturity of the senior construction loan, (iii) the sale of NDSH or (iv) the sale of the center. NDSH is current on this loan. As of December 31, 2017, the Company had funded $11.8 million on this loan. During the year ended December 31, 2017, the Company recognized $1.0 million of interest income on this loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note. Management has concluded that this entity is a VIE. Because NDSH is the developer of North Decatur Square, the Company does not have the power to direct the activities of the project that most significantly impact its performance. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements. Delray Plaza On October 27, 2017, the Company invested in the development of an estimated $20.0 million Whole Foods anchored center located in Delray Beach, Florida. The Company's investment is in the form of a mezzanine loan of up to $13.1 million to the developer, Delray Plaza Holdings, LLC ("DPH"). The mezzanine loan bears interest at an annual rate of 15%. The note matures on the earliest of (i) October 27, 2020, (ii) the date of any sale or refinance of the development project, or (iii) the disposition or change in control of the development project. As of December 31, 2017, the Company had funded $5.4 million on this loan. During the year ended December 31, 2017, the Company recognized $0.2 million of interest income on this loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note. Management has concluded that this entity is a VIE. Because DPH is the developer of Delray Plaza, the Company does not have the power to direct the activities of the project that most significantly impact its performance. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements. Subsequent to December 31, 2017 On January 31, 2018, the North Decatur Square mezzanine loan was modified to increase the maximum amount of the loan to $25.7 million.

Notes Receivable

Point Street Apartments

On October 15, 2015, the Company agreed to invest up to $28.2 million in the Point Street Apartments project in the Harbor Point area of Baltimore, Maryland. Point Street Apartments is an estimated $98.0 million development project with plans for a 17-story building comprised of 289 residential units and 18,000 square feet of street-level retail space. Beatty Development Group (“BDG”) is the developer of the project and has engaged the Company to serve as construction general contractor. Point Street Apartments is scheduled to open in the first quarter of 2018; however, management can provide no assurances that Point Street Apartments will open on the anticipated timeline or be completed at the anticipated cost.

BDG secured a senior construction loan of up to $67.0 million to fund the development and construction of Point Street Apartments on November 10, 2016. The Company has agreed to guarantee $25.0 million of the senior construction loan in exchange for the option to purchase up to an 88% controlling interest in Point Street Apartments upon completion of the project as follows: (i) an option to purchase a 79% indirect interest in Point Street Apartments for $27.3 million, exercisable within one year from the project’s completion (the “First Option”) and (ii) provided that the Company has exercised the First Option, an option to purchase an additional 9% indirect interest in Point Street Apartments for $3.1 million, exercisable within 27 months from the project’s completion (the “Second Option”). The Company currently has a $2.1 million letter of credit for the guarantee of the senior construction loan.

The Company’s investment in the Point Street Apartments project is in the form of a loan under which BDG may borrow up to $28.2 million (the “BDG loan”). Interest on the BDG loan accrues at 8.0% per annum and matures on the earliest of: (i) November 1, 2018, which may be extended by BDG under two one-year extension options, (ii) the maturity date or earlier termination of the senior construction loan, or (iii) the date the Company exercises the Second Option as described further below.

In the event the Company exercises the First Option, BDG is required to pay down the outstanding BDG loan in full, with the difference between the BDG loan and $28.2 million applied to the senior construction loan. In the event the Company exercises the Second Option, BDG is required to simultaneously repay any remaining amounts outstanding under the BDG loan, with any excess proceeds received from the exercise of the Second Option applied against the senior construction loan. In the event the Company does not exercise either the First Option or the Second Option, the interest rate on the BDG loan will automatically be reduced to the interest rate on the senior construction loan for the remaining term of the BDG loan.

As of December 31, 2017 and 2016, the Company had funded $22.4 million and $20.6 million, respectively, under the BDG loan and for the years ended December 31, 2017 and 2016, the Company recognized $1.7 million and $1.2 million, respectively, of interest income on the BDG loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note.

Management has concluded that this entity is a VIE. Because BDG is the developer of Point Street Apartments, the Company does not have the power to direct the activities of the project that most significantly impact its performance, nor is the Company the party most closely associated with the project. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements.

Annapolis Junction

On April 21, 2016, the Company entered into a note receivable with a maximum principal balance of $48.1 million in the Annapolis Junction residential component of the Annapolis Junction Town Center project in Maryland (“Annapolis Junction”). Annapolis Junction is an estimated $106.0 million mixed-use development project with plans for 416 residential units., It is part of a mixed-use development project that is also planned to have 17,000 square feet of retail space and a 150-room hotel. Annapolis Junction Apartments Owner, LLC (“AJAO”) is the developer of the residential component and has engaged the Company to serve as construction general contractor for the residential component. Portions of Annapolis Junction opened during the third and fourth quarters of 2017, and the remaining portions are scheduled to open during the first quarter of 2018; however, management can provide no assurances that Annapolis Junction will open on the anticipated timeline or at the anticipated cost.

AJAO secured a senior construction loan of up to $60.0 million to fund the development and construction of Annapolis Junction's residential component on September 30, 2016. The Company has agreed to guarantee up to $25.0 million of the senior construction loan in exchange for the option to purchase up to an 88% controlling interest in Annapolis Junction upon completion of the project as follows: (i) an option to purchase an 80% indirect interest in Annapolis Junction's residential component for the lesser of the seller’s budgeted or actual cost, exercisable within one year from the project’s completion (the “First Option”) and (ii) provided that the Company has exercised the First Option, an option to purchase an additional 8% indirect interest in Annapolis Junction for the lesser of the seller’s actual or budgeted cost, exercisable within 27 months from the project’s completion (the “Second Option”).

The Company’s investment in the Annapolis Junction project is in the form of a loan under which AJAO may borrow up to $48.1 million, including a $6.0 million interest reserve (the “AJAO loan”). Interest on the AJAO loan accrues at 10.0% per annum and matures on the earliest of: (i) December 21, 2020, which may be extended by AJAO under two one-year extension options, (ii) the maturity date or earlier termination of the senior construction loan, or (iii) the date the Company exercises the Second Option as described further below. In the event that the Company exercises the First Option, AJAO is required to simultaneously pay down both the senior construction loan and the AJAO loan by 80%, at which time the interest rate on the AJAO loan will automatically be reduced to the interest rate on the senior construction loan. In the event the Company exercises the Second Option, AJAO is required to simultaneously repay any remaining amounts outstanding under the AJAO loan, with any excess proceeds received from the exercise of the Second Option applied against the remaining balance of the senior construction loan. In the event that the Company does not exercise either the First Option or the Second Option, the interest rate on the AJAO loan will automatically be reduced to the interest rate on the senior construction loan for the remaining term of the AJAO loan.

The balance on the Annapolis Junction note was $43.0 million and $38.9 million as of December 31, 2017 and 2016, respectively. During the years ended December 31, 2017 and 2016, the Company recognized $4.1 million and $2.0 million, respectively, of interest income on the note. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note.

Management has concluded that this entity is a VIE. Because AJAO is the developer of Annapolis Junction, the Company does not have the power to direct the activities of the project that most significantly impact its performance, nor is the Company the party most closely associated with the project. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements.

North Decatur Square

On May 15, 2017, the Company invested in the development of an estimated $34.0 million Whole Foods anchored center located in Decatur, Georgia. The Company's investment is in the form of a mezzanine loan of up to $21.8 million to the developer, North Decatur Square Holdings, LLC ("NDSH"). The mezzanine loan bears interest at an annual rate of 15%. The note matures on the earliest of (i) May 15, 2022, (ii) the maturity of the senior construction loan, (iii) the sale of NDSH or (iv) the sale of the center. NDSH is current on this loan.

As of December 31, 2017, the Company had funded $11.8 million on this loan. During the year ended December 31, 2017, the Company recognized $1.0 million of interest income on this loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note.

Management has concluded that this entity is a VIE. Because NDSH is the developer of North Decatur Square, the Company does not have the power to direct the activities of the project that most significantly impact its performance. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements.

Delray Plaza

On October 27, 2017, the Company invested in the development of an estimated $20.0 million Whole Foods anchored center located in Delray Beach, Florida. The Company's investment is in the form of a mezzanine loan of up to $13.1 million to the developer, Delray Plaza Holdings, LLC ("DPH"). The mezzanine loan bears interest at an annual rate of 15%. The note matures on the earliest of (i) October 27, 2020, (ii) the date of any sale or refinance of the development project, or (iii) the disposition or change in control of the development project.

As of December 31, 2017, the Company had funded $5.4 million on this loan. During the year ended December 31, 2017, the Company recognized $0.2 million of interest income on this loan. No portion of the note receivable balance is past due, and the Company has not recorded an impairment balance on the note.

Management has concluded that this entity is a VIE. Because DPH is the developer of Delray Plaza, the Company does not have the power to direct the activities of the project that most significantly impact its performance. Therefore, the Company is not the project's primary beneficiary and does not consolidate the project in its consolidated financial statements.

Subsequent to December 31, 2017

On January 31, 2018, the North Decatur Square mezzanine loan was modified to increase the maximum amount of the loan to $25.7 million.