Real Estate and Lending Activities - Assets Acquired (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	$ 115,000
Total liabilities assumed
Net assets acquired	115,000
Land [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	8,515
Building [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	99,602
Intangible lease assets - subject to amortization [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	$ 6,883