Fair Value - Additional Information (Detail) $ in Thousands	3 Months Ended
	Jun. 30, 2016 USD ($) community_development_project multifamily_site
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets held for use	$ 48,826
Number of community development projects | community_development_project	5
Number of multifamily sites | multifamily_site	1
Oil and Gas Properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets to be disposed of	$ 612