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Leases Narrative (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 19, 2021 USD ($) ft² | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Lessor, Lease, Description [Line Items] |  |  |  |  |  |  |  |
Write-off for accrued rent |  | $ 600 |  | $ 35,900 | $ 1,200 |  | $ 37,400 |
Write-off for accounts receivable |  | 300 |  | 18,000 | 100 |  | 18,900 |
Operating Lease, Payments |  |  |  |  | 1,566 |  | (799) |
Right of use assets - operating leases |  | 170,331 | [1] |  | 170,331 | [1] |  | $ 146,406
Sumner Square |  |  |  |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |  |  |  |
Lessee, Operating Lease, Description | The amendment extends the ground lease for an additional 15 years. Prior to the amendment, the ground lease was scheduled to expire on August 10, 2066. The ground lease will now expire on August 9, 2081. |  |  |  |  |  |  |
Operating Lease, Payments | $ 23,000 |  |  |  |  |  |  |
Lessee Operating Lease Liability Payments Due, Next Five Years | $ 4,000 |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate | 3.95% |  |  |  |  |  |  |
Right of use assets - operating leases | $ 27,100 |  |  |  |  |  |  |
Operating lease costs |  | $ 200 |  | $ 300 | $ 500 |  | $ 700 |
Net Rentable Area (in sf) | ft² | 210,000 |  |  |  |  |  |  |
Operating Lease, Liability | $ 26,700 |  |  |  |  |  |  |
[1] | See Note 4.

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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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