Related Party Transactions	9 Months Ended
Sep. 30, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In connection with the closing of the acquisition of the ground and operating leases at 112 West 34^th Street from 112 West 34^th Street Associates L.L.C. and 112 West 34^th Street Company L.L.C. (the “112 Property”), and the ground lease at 1400 Broadway from 1400 Broadway Associates L.L.C. (the “1400 Property”), we entered into a registration rights agreement covering Class A and Class B common stock and Series PR operating partnership units issued to investors in entities that owned the 112 Property and 1400 Property. In connection with the closing of the acquisition of the ground and operating leases at 112 West 34^th Street from 112 West 34^th Street Associates L.L.C. and 112 West 34^th Street Company L.L.C. (the “112 Property”), and the ground lease at 1400 Broadway from 1400 Broadway Associates L.L.C. (the “1400 Property”), we entered into a registration rights agreement, dated July 15, 2014, covering Class A and Class B common stock and Series PR operating partnership units issued to investors in entities that owned the 112 Property and 1400 Property. To satisfy our obligation under the registration rights agreement, we filed an automatically effective shelf registration statement on October 7, 2014, along with a prospectus supplement, covering the issuance, among other things, of all shares of Class A common stock that may be issued upon redemption of Series PR operating partnership units or upon conversion of Class B common stock that were issued to investors that owned the 112 Property and 1400 Property. Additionally, the shares of Class A common stock issued to the Malkin family in connection with the transactions are subject to the demand and piggy-back rights that the Malkin family has under the registration rights agreement we entered into in connection with the consolidation and initial public offering of our Class A common stock. The foregoing does not purport to be a complete description of the terms of the registration rights agreement and is qualified in its entirety by the registration rights agreement, which is attached as exhibit 10.1 to this Quarterly Report on Form 10-Q. We executed option agreements with affiliates of our predecessor granting us the right to acquire long-term leasehold and/or sub-leasehold interests in 1400 Broadway and/or 112 West 34th Street (including fee title interest in a small connected structure at 122 West 34^th Street), both office properties in midtown Manhattan. On July 15, 2014, we completed the acquisition of the option properties. Our subsidiary supervised each of the option properties pursuant to a management agreement entered into by our subsidiary and the owners of the option properties. The purchase price for each of the option properties was based on an appraisal by independent third parties utilizing the appraisal process set forth in the option agreements. As part of the option agreements, we agreed that Anthony E. Malkin, our Chairman, Chief Executive Officer and President, would not participate in the negotiations and valuation process on our behalf. Our Chairman Emeritus, Peter L. Malkin, also agreed not to participate in the process. In addition our Board of Directors appointed a special committee consisting of independent members of such Board to review the appraisal process on its behalf. The independent members of our Board of Directors unanimously approved the price and terms of the acquisition of interests in each of the option properties. The purchase price was payable in a combination of cash, shares of our common stock and operating partnership units, but the estate of Leona M. Helmsley (a member of affiliates of our predecessor and of the owners of option properties) received all cash. Reference is made to Note 3. Supervisory Fee Revenue We or our predecessor earned supervisory fees from affiliated entities not included in our and our predecessor's consolidated financial statements of $0.5 million for the three months ended September 30, 2014 and 2013, and $1.6 million and $2.4 million for the nine months ended September 30, 2014 and 2013, respectively. These fees are included within third-party management and other fees. We or our predecessor earned supervisory fees from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method of $0.2 million and $0.6 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three months and nine months ended September 30, 2014. These fees are included within third-party management and other fees. Property Management Fee Revenue We or our predecessor earned property management fees from affiliated entities not included in our and our predecessor's consolidated financial statements of $0.1 million and $0.2 million for the three months ended September 30, 2014 and 2013, respectively, and $0.3 million and $1.5 million for the nine months ended September 30, 2014 and 2013, respectively. These fees are included within third-party management and other fees. We or our predecessor earned property management fees from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method of $0.1 million for the nine months ended September 30, 2013. There were no such revenues in the three and nine months ended September 30, 2014 or the three months ended September 30, 2013. These fees are included within third-party management and other fees. Profit Share We or our predecessor received additional payments equal to a specified percentage of distributions in excess of specified amounts, both being defined, from affiliated entities not included in our and our predecessor's consolidated financial statements. Our profits interest totaled $0.4 million and $0.8 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees. We or our predecessor received additional payments equal to a specified percentage of distributions in excess of specified amounts, both being defined, from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method. Our predecessor's profits interest totaled $0.1 million and $0.4 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees. Other Fees and Disbursements from Non-Controlled Affiliates Our predecessor earned other fees and disbursements from unconsolidated subsidiaries included in its consolidated financial statements on the equity method of $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees. Included in these other fees are reimbursements from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method for offering costs related to the Offering of $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. Family Office Services In 2014, family office services comprise of temporarily continuing to provide office space, equipment, and administrative support as was done prior to our formation. We are reimbursed at allocable cost. In 2013, the predecessor provided certain accounting and bookkeeping services. The sponsors reimbursed us in the amount of less than $0.1 million and $0.2 million for the three months ended September 30, 2014 and 2013, respectively, and $0.1 million and $0.6 million for the nine months ended September 30, 2014 and 2013, respectively.

Related Party Transactions

In connection with the closing of the acquisition of the ground and operating leases at 112 West 34^th Street from 112 West 34^th Street Associates L.L.C. and 112 West 34^th Street Company L.L.C. (the “112 Property”), and the ground lease at 1400 Broadway from 1400 Broadway Associates L.L.C. (the “1400 Property”), we entered into a registration rights agreement covering Class A and Class B common stock and Series PR operating partnership units issued to investors in entities that owned the 112 Property and 1400 Property. In connection with the closing of the acquisition of the ground and operating leases at 112 West 34^th Street from 112 West 34^th Street Associates L.L.C. and 112 West 34^th Street Company L.L.C. (the “112 Property”), and the ground lease at 1400 Broadway from 1400 Broadway Associates L.L.C. (the “1400 Property”), we entered into a registration rights agreement, dated July 15, 2014, covering Class A and Class B common stock and Series PR operating partnership units issued to investors in entities that owned the 112 Property and 1400 Property. To satisfy our obligation under the registration rights agreement, we filed an automatically effective shelf registration statement on October 7, 2014, along with a prospectus supplement, covering the issuance, among other things, of all shares of Class A common stock that may be issued upon redemption of Series PR operating partnership units or upon conversion of Class B common stock that were issued to investors that owned the 112 Property and 1400 Property. Additionally, the shares of Class A common stock issued to the Malkin family in connection with the transactions are subject to the demand and piggy-back rights that the Malkin family has under the registration rights agreement we entered into in connection with the consolidation and initial public offering of our Class A common stock. The foregoing does not purport to be a complete description of the terms of the registration rights agreement and is qualified in its entirety by the registration rights agreement, which is attached as exhibit 10.1 to this Quarterly Report on Form 10-Q.

We executed option agreements with affiliates of our predecessor granting us the right to acquire long-term leasehold and/or sub-leasehold interests in 1400 Broadway and/or 112 West 34th Street (including fee title interest in a small connected structure at 122 West 34^th Street), both office properties in midtown Manhattan. On July 15, 2014, we completed the acquisition of the option properties. Our subsidiary supervised each of the option properties pursuant to a management agreement entered into by our subsidiary and the owners of the option properties. The purchase price for each of the option properties was based on an appraisal by independent third parties utilizing the appraisal process set forth in the option agreements. As part of the option agreements, we agreed that Anthony E. Malkin, our Chairman, Chief Executive Officer and President, would not participate in the negotiations and valuation process on our behalf. Our Chairman Emeritus, Peter L. Malkin, also agreed not to participate in the process. In addition our Board of Directors appointed a special committee consisting of independent members of such Board to review the appraisal process on its behalf. The independent members of our Board of Directors unanimously approved the price and terms of the acquisition of interests in each of the option properties. The purchase price was payable in a combination of cash, shares of our common stock and operating partnership units, but the estate of Leona M. Helmsley (a member of affiliates of our predecessor and of the owners of option properties) received all cash. Reference is made to Note 3.

Supervisory Fee Revenue

We or our predecessor earned supervisory fees from affiliated entities not included in our and our predecessor's consolidated financial statements of $0.5 million for the three months ended September 30, 2014 and 2013, and $1.6 million and $2.4 million for the nine months ended September 30, 2014 and 2013, respectively. These fees are included within third-party management and other fees.

We or our predecessor earned supervisory fees from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method of $0.2 million and $0.6 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three months and nine months ended September 30, 2014. These fees are included within third-party management and other fees.

Property Management Fee Revenue

We or our predecessor earned property management fees from affiliated entities not included in our and our predecessor's consolidated financial statements of $0.1 million and $0.2 million for the three months ended September 30, 2014 and 2013, respectively, and $0.3 million and $1.5 million for the nine months ended September 30, 2014 and 2013, respectively. These fees are included within third-party management and other fees.

We or our predecessor earned property management fees from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method of $0.1 million for the nine months ended September 30, 2013. There were no such revenues in the three and nine months ended September 30, 2014 or the three months ended September 30, 2013. These fees are included within third-party management and other fees.

Profit Share

We or our predecessor received additional payments equal to a specified percentage of distributions in excess of specified amounts, both being defined, from affiliated entities not included in our and our predecessor's consolidated financial statements. Our profits interest totaled $0.4 million and $0.8 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees.

We or our predecessor received additional payments equal to a specified percentage of distributions in excess of specified amounts, both being defined, from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method. Our predecessor's profits interest totaled $0.1 million and $0.4 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees.

Other Fees and Disbursements from Non-Controlled Affiliates

Our predecessor earned other fees and disbursements from unconsolidated subsidiaries included in its consolidated financial statements on the equity method of $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014. These fees are included within other income and fees.

Included in these other fees are reimbursements from unconsolidated entities included in our predecessor's consolidated financial statements on the equity method for offering costs related to the Offering of $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively. There were no such revenues in the three and nine months ended September 30, 2014.

Family Office Services

In 2014, family office services comprise of temporarily continuing to provide office space, equipment, and administrative support as was done prior to our formation. We are reimbursed at allocable cost. In 2013, the predecessor provided certain accounting and bookkeeping services. The sponsors reimbursed us in the amount of less than $0.1 million and $0.2 million for the three months ended September 30, 2014 and 2013, respectively, and $0.1 million and $0.6 million for the nine months ended September 30, 2014 and 2013, respectively.