Summary of Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
Summary Of Significant Accounting Policies [Line Items]
ADC Arrangement	The Company has an acquisition, development and construction loan arrangement (“ADC Arrangement”) under which it provides financing to a property developer for the acquisition, development, and construction of a retail shopping center. The Company also expects to participate in the residual profit resulting from the ultimate sale or other use of the property. Classification and accounting for the ADC Arrangement as a loan, an investment in real estate, or joint venture is determined by the Company’s evaluation of the characteristics and the risks and rewards of the ADC Arrangement. If the Company expects to receive more than 50% of the residual profit from the ADC arrangement and it has characteristics similar to a real estate investment, the costs of the real estate project will be capitalized and interest will be recognized in net investment income
Percentage of investment in unconsolidated entities	90.00%
Investment in Joint Venture [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of investment in unconsolidated entities	90.00%