Summary of Significant Accounting Policies - Restricted Cash Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Total restricted cash	$ 11,514	$ 6,310
2013 mortgage notes’ escrow accounts | 2013 Mortgage Loans | Mortgage Loans
Cash and Cash Equivalents [Line Items]
Total restricted cash	1,157	877
2013 mortgage notes’ cash managed accounts | 2013 Mortgage Loans | Mortgage Loans
Cash and Cash Equivalents [Line Items]
Total restricted cash	2,393	2,343
Cash on deposit for workers’ compensation program | Europe
Cash and Cash Equivalents [Line Items]
Total restricted cash	3,034	2,525
Cash on deposit for workers’ compensation program | North America
Cash and Cash Equivalents [Line Items]
Total restricted cash	1,390	0
New market tax credit reserve accounts
Cash and Cash Equivalents [Line Items]
Total restricted cash	584	565
Agro Europe
Cash and Cash Equivalents [Line Items]
Total restricted cash	$ 2,956	$ 0