Business and Significant Accounting Policies - Schedule of Property Plant and Equipment Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2014
Furniture and equipment [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	3 years
Furniture and equipment [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	10 years
Leasehold, building and land improvements [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	3 years
Leasehold, building and land improvements [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	14 years
Buildings [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	20 years
Buildings [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful Life	40 years