Notes and Interest Receivable due from Related Parties (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Notes Receivable, Related Parties	$ 164,084	$ 140,903
Arlo, formerly West Morehead [Member]
Notes Receivable, Related Parties	24,893	24,893
Cade Boca Raton, formerly APOK Townhomes [Member]
Notes Receivable, Related Parties	11,854	11,365
Domain at The One Forty, formerly Domain [Member]
Notes Receivable, Related Parties	20,536	20,536
Flagler Village [Member]
Notes Receivable, Related Parties	75,436	53,668
Novel Perimeter, formerly Crescent Perimeter [Member]
Notes Receivable, Related Parties	20,867	20,622
Vickers Historic Roswell, formerly Vickers Village [Member]
Notes Receivable, Related Parties	$ 10,498	$ 9,819