Land, Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Cost	$ 172,002	$ 172,729
Less accumulated depreciation and amortization	(100,999)	(100,901)
Land, property and equipment, net	$ 71,003	$ 71,828	[1]

[1] The balance sheet data at December 31, 2015, has been derived from audited financial statements at that date. It does not include, however, all of the information and notes required by US generally accepted accounting principles for complete financial statements.