Related-Party Transactions	3 Months Ended
Mar. 31, 2018
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party Transactions Transactions with Goldman Affiliates of Goldman are part of the lending group that has $45.0 million, or approximately 4.9%, of the total commitment under the 2018 Senior Secured Credit Facilities. Another affiliate of Goldman is one of the participating lenders in the ANZ Loans (with a 2.5% participation in the Australia Term Loan and 31.8% in the New Zealand Term Loan). Goldman is also the counterparty to the interest rate swap agreements described in Note 6. The Company is required to pay certain fees to Goldman, which may include interest on borrowings, unused facility fees, letter of credit participation fees, and letter of credit facility fees. During the three months ended March 31, 2018 and 2017, the Company paid interest expense and fees to Goldman totaling approximately $0.9 million and $0.3 million, respectively. Interest payable to Goldman was nominal as of March 31, 2018 and December 31, 2017. Transaction with YF ART Holdings On March 8, 2018, YF ART Holdings entered into a margin loan agreement pledging 54,952,774 common shares of beneficial interest, $0.01 par value per share, representing approximately 38.6% of the Company’s issued and outstanding common shares as of March 31, 2018. YF ART Holdings used the proceeds from the financing agreement to pay in full the outstanding investment, including the preferred return thereon, of Fortress, which ceased to be a limited partner in YF ART Holdings and no longer has any economic interest therein. In connection with the pledge by YF ART Holdings described above, the Company delivered a consent and acknowledgement to YF ART Holdings and the lenders under such margin loan agreement in which the Company, among other matters, agreed, subject to applicable law and stock exchange rules, not to take any actions that would adversely affect the enforcement of the rights of the lenders under the loan documents. The Company is not a party to the margin loan agreement and has no obligations thereunder. In consideration of our agreement to enter into such consent and acknowledgment, YF ART Holdings entered into a letter agreement with us that provides that, among other matters, YF ART Holdings may not, without our prior written consent, directly or indirectly transfer or dispose of an amount greater than approximately 27.5 million common shares, subject to certain exceptions (including as relating to the margin loan agreement and related documents), for a ninety-day period beyond the lock-up period applicable to YF ART Holdings’ common shares under the lock-up agreement it entered into with the representatives of the underwriters for the IPO. The Company also entered into an amendment of the shareholders agreement, which addresses certain matters related to the margin loan agreement and related documents.

Related-Party Transactions

Transactions with Goldman

Affiliates of Goldman are part of the lending group that has $45.0 million, or approximately 4.9%, of the total commitment under the 2018 Senior Secured Credit Facilities. Another affiliate of Goldman is one of the participating lenders in the ANZ Loans (with a 2.5% participation in the Australia Term Loan and 31.8% in the New Zealand Term Loan). Goldman is also the counterparty to the interest rate swap agreements described in Note 6.

The Company is required to pay certain fees to Goldman, which may include interest on borrowings, unused facility fees, letter of credit participation fees, and letter of credit facility fees. During the three months ended March 31, 2018 and 2017, the Company paid interest expense and fees to Goldman totaling approximately $0.9 million and $0.3 million, respectively. Interest payable to Goldman was nominal as of March 31, 2018 and December 31, 2017.

Transaction with YF ART Holdings

On March 8, 2018, YF ART Holdings entered into a margin loan agreement pledging 54,952,774 common shares of beneficial interest, $0.01 par value per share, representing approximately 38.6% of the Company’s issued and outstanding common shares as of March 31, 2018. YF ART Holdings used the proceeds from the financing agreement to pay in full the outstanding investment, including the preferred return thereon, of Fortress, which ceased to be a limited partner in YF ART Holdings and no longer has any economic interest therein.

In connection with the pledge by YF ART Holdings described above, the Company delivered a consent and acknowledgement to YF ART Holdings and the lenders under such margin loan agreement in which the Company, among other matters, agreed, subject to applicable law and stock exchange rules, not to take any actions that would adversely affect the enforcement of the rights of the lenders under the loan documents. The Company is not a party to the margin loan agreement and has no obligations thereunder. In consideration of our agreement to enter into such consent and acknowledgment, YF ART Holdings entered into a letter agreement with us that provides that, among other matters, YF ART Holdings may not, without our prior written consent, directly or indirectly transfer or dispose of an amount greater than approximately 27.5 million common shares, subject to certain exceptions (including as relating to the margin loan agreement and related documents), for a ninety-day period beyond the lock-up period applicable to YF ART Holdings’ common shares under the lock-up agreement it entered into with the representatives of the underwriters for the IPO. The Company also entered into an amendment of the shareholders agreement, which addresses certain matters related to the margin loan agreement and related documents.