Description of Business and Organization - The Predecessor Narrative (Details)	Dec. 31, 2014 sqft
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property	10,000,000
Predecessor [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property	380,000
Predecessor [Member] | Office and Retail Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties	18
Predecessor [Member] | Office and Retail Properties [Member] | Consolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties	16
Predecessor [Member] | Office and Retail Properties [Member] | Unconsolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties	2
Predecessor [Member] | Development Parcel [Member] | Consolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties	1
Predecessor [Member] | Office Properties [Member] | Unconsolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties	4
Area of real estate property	380,000