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Summary of Significant Accounting Policies (Discontinued Operations - Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Total real estate and other assets available and held for sale and classified as discontinued operations | $ 2,299,711 | $ 2,228,570
Liabilities |  |
Total liabilities associated with real estate held for sale and classified as discontinued operations | 968,419 | 990,656
Net Lease Business Segment | Discontinued Operations, Held-for-sale [Member] |  |
Assets |  |
Real estate, at cost | 1,537,655 | 1,542,101
Less: accumulated depreciation | (271,183) | (250,198)
Total real estate, net | 1,266,472 | 1,291,903
Net investment in leases ($10,871 of allowances as of December 31, 2020) | 486,389 | 429,101
Loan receivable held for sale | 48,675 | 45,399
Other investments | 103,229 | 78,998
Finance lease right of use assets | 150,099 | 143,727
Accrued interest and operating lease income receivable, net | 2,997 | 3,926
Deferred operating lease income receivable, net | 63,156 | 55,223
Deferred expenses and other assets, net | 178,694 | 180,293
Total real estate and other assets available and held for sale and classified as discontinued operations | 2,299,711 | 2,228,570
Liabilities |  |
Accounts payable, accrued expenses and other liabilities | 92,865 | 122,441
Finance lease liabilities | 161,258 | 150,520
Debt obligations, net | 714,296 | 717,695
Total liabilities associated with real estate held for sale and classified as discontinued operations | $ 968,419 | 990,656
Net investment in leases, allowance |  | $ 10,871

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