Schedule IV - Changes in Mortgage Loans Excluding Unamortized Loan Issue Costs (Parenthetical) (Detail) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2018
Mortgage Loans on Real Estate [Line Items]
Loans repaid	[1]	$ 834,743	$ 764,447
Mortgage Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Loans repaid		$ 835,000

[1] The 2020 column includes approximately $750 million of loans advanced to Steward in 2017 and exchanged for the fee simple real estate of two hospitals as described below, as well as approximately $100 million of loans advanced to Ernest Health, Inc. (“Ernest”) in 2012 and exchanged for the fee simple real estate of four hospitals as described below. The 2018 column includes $0.8 billion of loans advanced to Steward in 2016 and repaid in 2018 as part of sale leaseback conversion described below.