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Mortgage Indebtedness - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 13, 2015	Jan. 27, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Cash paid for interest					$ 8,615	$ 3,527
Mortgage indebtedness, carrying amount			$ 457,202		457,202		$ 400,509
Sponsor
Mortgage Loans on Real Estate [Line Items]
Debt			38,075		38,075		38,075
Cash paid for interest			241	$ 241	479	$ 479
Third Parties
Mortgage Loans on Real Estate [Line Items]
Debt			403,360		403,360		$ 360,902
The Huntington National Bank
Mortgage Loans on Real Estate [Line Items]
Repayment of secured credit facility			0		18,392
Proceed of secured credit facility			14,848		14,848
Remaining of secured credit facility			15,152		$ 15,152
Weighted Average
Mortgage Loans on Real Estate [Line Items]
Mortgage indebtedness, effective interest rate					3.60%		3.60%
Iron Rock Ranch
Mortgage Loans on Real Estate [Line Items]
Mortgage indebtedness, effective interest rate		3.40%			3.40%
Mortgage indebtedness, carrying amount		$ 22,900	22,900		$ 22,900
Mortgage indebtedness, maturity date		Feb. 01, 2025			Feb. 01, 2025
Stonebridge At The Ranch
Mortgage Loans on Real Estate [Line Items]
Mortgage indebtedness, effective interest rate	3.20%				3.20%
Mortgage indebtedness, carrying amount	$ 20,527		$ 20,527		$ 20,527
Mortgage indebtedness, maturity date	May 01, 2025				May 01, 2025

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The amount of cash paid for interest during the period.

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