Assets Recorded at Cost and Depreciated Using Straight-Line Method Over Estimated Useful Lives or Terms of Related Leases, If Shorter (Detail)	12 Months Ended
	Dec. 31, 2016
Buildings and improvements | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	10 years
Buildings and improvements | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	40 years
Furniture and Fixtures [Member] | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	3 years
Furniture and Fixtures [Member] | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	20 years
Leasehold improvements | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	10 years
Leasehold improvements | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	20 years