Estimated Useful Lives and Accumulated Depreciation for Assets (Detail)	12 Months Ended
	Dec. 31, 2014
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	39 years
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Software | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Software | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years