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Troubled Debt Restructuring (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 0 | $ 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 309,309 | 319,319
Impaired Financing Receivable, Trouble Debt Structuring, Total | 309,309 | 319,319
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 0
Commercial Real Estate Other Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 206,206 | 212,212
Impaired Financing Receivable, Trouble Debt Structuring, Total | 206,206 | 212,212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 0
Commercial Real Estate Loans, Total [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 206,206 | 212,212
Impaired Financing Receivable, Trouble Debt Structuring, Total | 206,206 | 212,212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 0
Residential Real Estate Investment Property Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 103,103 | 107,107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 103,103 | 107,107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 0
Residential Real Estate Loans, Total [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 103,103 | 107,107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 103,103 | 107,107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 0 | $ 0

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