Related Parties	12 Months Ended
Dec. 31, 2022
Related Party Transactions [Abstract]
Related Parties	21. Related Parties Management Agreements We provide property management, leasing and other related services to certain properties owned by members of the Otto Family. We recognized fee income of $1,322,000, $1,726,000 and $1,227,000 for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with these agreements, which is included as a component of “fee and other income” on our consolidated statements of income. As of December 31, 2022 and December 31, 2021, amounts owed to us under these agreements aggregated $52,000 and $484,000, respectively, which are included as a component of “accounts and other receivables” on our consolidated balance sheets. We also provide asset management, property management, leasing and other related services to our unconsolidated joint ventures and real estate related funds. We recognized fee income of $24,315,000, $23,240,000 and $22,986,000, for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with these agreements. As of December 31, 2022 and 2021, amounts owed to us under these agreements aggregated $3,032,000 and $2,883,000, respectively, which are included as a component of “accounts and other receivables” on our consolidated balance sheets. HT Consulting GmbH We have an agreement with HT Consulting GmbH ("HTC"), formerly known as Hamburg Trust Consulting HTC GmbH, a licensed broker in Germany, to supervise selling efforts for our joint ventures and real estate related funds (or investments in feeder vehicles for these funds) to investors in Germany, including distribution of securitized notes of feeder vehicles for Fund X. Pursuant to this agreement, we have agreed to pay HTC for the costs incurred plus a mark-up of 10%. HTC is 100% owned by Albert Behler, our Chairman, Chief Executive Officer and President. We incurred expenses of $713,000, $645,000 and $512,000 for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with this agreement. As of December 31, 2022 and 2021, we owed $119,000 and $523,000, respectively, to HTC under this agreement, which are included as a component of “accounts payable and accrued expenses” on our consolidated balance sheets. ParkProperty Capital, LP ParkProperty Capital, LP (“ParkProperty”), an entity partially owned by Katharina Otto-Bernstein (a member of our Board of Directors), leased 3,330 square feet at 1633 Broadway ("1633 Lease"). In December 2022, upon expiration of the 1633 Lease, ParkProperty entered into a five-year lease for 4,233 square feet at 1325 Avenue of the Americas. We recognized rental revenue of $220,000, $212,000 and $210,000 in the years ended December 31, 2022, 2021 and 2020, respectively pursuant to these leases. Mannheim Trust A subsidiary of Mannheim Trust leases 5,593 square feet at 712 Fifth Avenue, our 50.0% owned unconsolidated joint venture, pursuant to a lease agreement which expires in April 2023. In December 2022, the subsidiary entered into a new lease for 3,127 square feet at 712 Fifth Avenue. The new lease will become effective in May 2023, upon expiration of the existing lease and will expire in June 2025. Dr. Martin Bussmann (a member of our Board of Directors) was also a trustee and a director of Mannheim Trust through December 2022. We recognized $364,000 for the year ended December 31, 2022, and $362,000 in each of the years ended December 31, 2021 and 2020, for our share of rental income pursuant to this lease. Due from Affiliates During the year ended December 31, 2022, Fund X borrowed $59,000,000 from us at an interest rate of Secured Overnight Financing Rate ("SOFR") plus 220 basis points, which was repaid, together with $418,000 of accrued interest.

Related Parties

12 Months Ended

Dec. 31, 2022

21. Related Parties

Management Agreements

We provide property management, leasing and other related services to certain properties owned by members of the Otto Family. We recognized fee income of $1,322,000, $1,726,000 and $1,227,000 for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with these agreements, which is included as a component of “fee and other income” on our consolidated statements of income. As of December 31, 2022 and December 31, 2021, amounts owed to us under these agreements aggregated $52,000 and $484,000, respectively, which are included as a component of “accounts and other receivables” on our consolidated balance sheets.

We also provide asset management, property management, leasing and other related services to our unconsolidated joint ventures and real estate related funds. We recognized fee income of $24,315,000, $23,240,000 and $22,986,000, for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with these agreements. As of December 31, 2022 and 2021, amounts owed to us under these agreements aggregated $3,032,000 and $2,883,000, respectively, which are included as a component of “accounts and other receivables” on our consolidated balance sheets.

HT Consulting GmbH

We have an agreement with HT Consulting GmbH ("HTC"), formerly known as Hamburg Trust Consulting HTC GmbH, a licensed broker in Germany, to supervise selling efforts for our joint ventures and real estate related funds (or investments in feeder vehicles for these funds) to investors in Germany, including distribution of securitized notes of feeder vehicles for Fund X. Pursuant to this agreement, we have agreed to pay HTC for the costs incurred plus a mark-up of 10%. HTC is 100% owned by Albert Behler, our Chairman, Chief Executive Officer and President. We incurred expenses of $713,000, $645,000 and $512,000 for the years ended December 31, 2022, 2021 and 2020, respectively, in connection with this agreement. As of December 31, 2022 and 2021, we owed $119,000 and $523,000, respectively, to HTC under this agreement, which are included as a component of “accounts payable and accrued expenses” on our consolidated balance sheets.

ParkProperty Capital, LP

ParkProperty Capital, LP (“ParkProperty”), an entity partially owned by Katharina Otto-Bernstein (a member of our Board of Directors), leased 3,330 square feet at 1633 Broadway ("1633 Lease"). In December 2022, upon expiration of the 1633 Lease, ParkProperty entered into a five-year lease for 4,233 square feet at 1325 Avenue of the Americas. We recognized rental revenue of $220,000, $212,000 and $210,000 in the years ended December 31, 2022, 2021 and 2020, respectively pursuant to these leases.

Mannheim Trust

A subsidiary of Mannheim Trust leases 5,593 square feet at 712 Fifth Avenue, our 50.0% owned unconsolidated joint venture, pursuant to a lease agreement which expires in April 2023. In December 2022, the subsidiary entered into a new lease for 3,127 square feet at 712 Fifth Avenue. The new lease will become effective in May 2023, upon expiration of the existing lease and will expire in June 2025. Dr. Martin Bussmann (a member of our Board of Directors) was also a trustee and a director of Mannheim Trust through December 2022. We recognized $364,000 for the year ended December 31, 2022, and $362,000 in each of the years ended December 31, 2021 and 2020, for our share of rental income pursuant to this lease.

Due from Affiliates

During the year ended December 31, 2022, Fund X borrowed $59,000,000 from us at an interest rate of Secured Overnight Financing Rate ("SOFR") plus 220 basis points, which was repaid, together with $418,000 of accrued interest.