Real Estate and Lending Activities - Twelve Oaks Facility - Additional Information (Detail)		6 Months Ended
	Apr. 11, 2019 RenewalOption Facility	Jun. 30, 2019
Business Acquisition [Line Items]
Term of lease extension, years		5 years
Oaks Facility [Member] | Advanced Diagnostics [Member]
Business Acquisition [Line Items]
Number of re-leased facilities | Facility	12
Term of lease	10 years
Lease extension options, description		four additional five-year extension options
Existence of option to extend	true
Number of lease extension options | RenewalOption	4
Term of lease extension, years	5 years