Significant Accounting Policies and Recently Issued Accounting Standards - Summary of Property and Equipment (Detail)	6 Months Ended
	Jun. 30, 2019
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	40 years
Furniture, Fixtures and Other Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	2 years
Furniture, Fixtures and Other Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	10 years