Fair Value Measurements Fair Value by Balance Sheet Grouping (Details) - USD ($)	Sep. 30, 2020		Dec. 31, 2019		Sep. 30, 2019	Dec. 31, 2018
Carrying Amount(1)
Mortgage loans payable	$ 17,974,000	[1]	$ 26,070,000	[1]	$ 26,229,000	$ 16,892,000
Line of credit and term loans	477,306,000		393,217,000
Fair Value
Mortgage loans payable	21,944,000		26,677,000
Line of credit and term loans	$ 480,348,000		$ 396,891,000

[1] Such liabilities of Griffin-American Healthcare REIT IV, Inc. as of September 30, 2020 and December 31, 2019 represented liabilities of Griffin American Healthcare REIT IV Holdings, LP or its consolidated subsidiaries. Griffin-American Healthcare REIT IV Holdings, LP is a variable interest entity, or VIE, and a consolidated subsidiary of Griffin-American Healthcare REIT IV, Inc. The creditors of Griffin-American Healthcare REIT IV Holdings, LP or its consolidated subsidiaries do not have recourse against Griffin-American Healthcare REIT IV, Inc., except for the 2018 Credit Facility, as defined in Note 7, held by Griffin-American Healthcare REIT IV Holdings, LP in the amount of $479,500,000 and $396,800,000 as of September 30, 2020 and December 31, 2019, respectively, which is guaranteed by Griffin-American Healthcare REIT IV, Inc.