Consolidated Financial Statements - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) Dwellings Segment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of concentration by bank to lessors and owners of Residential Buildings and Dwellings | Dwellings	2
Non Residential Buildings and Dwellings [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Amount payable to lessors	$ 215,807
Amount payable to lessors in percentage	21.70%
Residential Buildings and Dwellings [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Amount payable to lessors	$ 134,752
Amount payable to lessors in percentage	13.60%
Maximum [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%
Water St. [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segment | Segment	1
Water St. [Member] | Maximum [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%