Investment in Unconsolidated Joint Ventures (HICO Victory Center LP) (Details) - HICO Victory Center LP $ in Thousands	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Land funding requirement (percent)	75.00%
Cash balance of joint venture	$ 565
Minimum
Schedule of Equity Method Investments [Line Items]
Future ownership percentage of partner in joint venture	90.00%
Hines
Schedule of Equity Method Investments [Line Items]
Land funding requirement (percent)	25.00%
Hines | Maximum
Schedule of Equity Method Investments [Line Items]
Future ownership percentage of partner in joint venture	10.00%