Credit Borrowings	9 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]
Credit Borrowings	Credit Borrowings Credit Facility On July 25, 2013, the Company, through the OP, entered into a credit facility (the "Credit Facility") that provided for aggregate revolving loan borrowings of up to $50.0 million (subject to borrowing base availability). The Credit Facility has been amended at various times, and maximum borrowings have increased to $740.0 million, with the most recent increase being on August 24, 2015. The Company had $671.0 million (including £160.2 million and €278.9 million) and $717.3 million (including £160.2 million and €288.4 million) outstanding under the Credit Facility as of September 30, 2016 and December 31, 2015, respectively. Availability of borrowings is based on a pool of eligible unencumbered real estate assets. On July 25, 2016, the Company extended the maturity date of the Credit Facility to July 25, 2017, with an additional one-year extension option remaining, for an extension fee of $1.5 million, subject to certain conditions. The Company has the option, based upon its consolidated leverage ratio, to have draws under the Credit Facility priced at either the Alternate Base Rate (as described below) plus 0.60% to 1.20% or at Adjusted LIBOR (as described below) plus 1.60% to 2.20%. The Alternate Base Rate is defined in the Credit Facility as a rate per annum equal to the greatest of (a) the fluctuating annual rate of interest announced from time to time by the lender as its “prime rate” in effect on such day, (b) the federal funds effective rate in effect on such day plus half of 1% and (c) the Adjusted LIBOR for a one-month interest period on such day plus 1%. Adjusted LIBOR refers to LIBOR multiplied by the statutory reserve rate, as determined by the Federal Reserve System of the United States. The Credit Facility agreement requires the Company to pay an unused fee per annum of 0.25% if the unused balance of the Credit Facility exceeds or is equal to 50% of the available facility or a fee per annum of 0.15% if the unused balance of the Credit Facility is less than 50% of the available facility. As of September 30, 2016, the Credit Facility reflected variable and fixed rate borrowings with a carrying value and fair value of $671.0 million, and a weighted average effective interest rate of 2.4% after giving effect to interest rate swaps in place. The unused borrowing capacity under the Credit Facility as of September 30, 2016 and December 31, 2015 was $69.0 million and $22.7 million, respectively. The Credit Facility agreement provides for quarterly interest payments for each Alternate Base Rate loan and periodic payments for each Adjusted LIBOR loan, based upon the applicable LIBOR loan period, with all principal outstanding being due on the extended maturity date in July 2017. The Credit Facility agreement may be prepaid at any time, in whole or in part, without premium or penalty, subject to prior notice to the lender. In the event of a default, the lender has the right to terminate their obligations under the Credit Facility agreement and to accelerate the payment on any unpaid principal amount of all outstanding loans. The Credit Facility requires the Company to meet certain financial covenants, including the maintenance of certain financial ratios (such as specified debt to equity and debt service coverage ratios) as well as the maintenance of a minimum net worth. As of September 30, 2016, the Company was in compliance with the financial covenants under the Credit Facility. In October 2016, the Company paid down $25.0 million of its US dollar advances. The total gross carrying value of unencumbered assets as of September 30, 2016 was $1.5 billion. A portion of foreign currency draws under the Credit Facility are designated as net investment hedges of the Company's investments during the periods reflected in the consolidated statements of operations (see Note 7 — Derivatives and Hedging Activities for further discussion). Bridge Loan Facility On August 8, 2016, in connection with the execution of the Merger Agreement, the OP entered into a bridge loan commitment letter, pursuant to which UBS Securities LLC and UBS AG, Stamford Branch agreed to provide a $150.0 million senior secured bridge loan facility (the "Bridge Loan Facility") for a term of 364 days from date of the merger transaction. Amounts drawn on the Bridge Loan Facility are subject to interest at LIBOR plus 3.25% per annum with a minimum floor of 4.00%. The margin rate of 3.25% per annum will increase by 0.75% 90 days after the date of funding and increases by 0.75% every 90 days thereafter with a maximum increase rate of 2.25%. The Bridge Loan Facility requires a 1.50% fee of the commitment amount upon execution and a fee equal to 0.375% of the commitments 180 days after signing. The Bridge Loan Facility is subject to a duration fee of 1.0% on outstanding draws 90 days after the date of funding. In addition, the Bridge Loan Facility requires a repayment fee of 0.5% on repayments made within 30 days of funding and a repayment fee of 1.0% fee on repayments made after 30 days after funding. The Bridge Loan Facility is subject to cross default provisions with the Company’s Credit Facility.

Credit Borrowings

Credit Facility

On July 25, 2013, the Company, through the OP, entered into a credit facility (the "Credit Facility") that provided for aggregate revolving loan borrowings of up to $50.0 million (subject to borrowing base availability). The Credit Facility has been amended at various times, and maximum borrowings have increased to $740.0 million, with the most recent increase being on August 24, 2015. The Company had $671.0 million (including £160.2 million and €278.9 million) and $717.3 million (including £160.2 million and €288.4 million) outstanding under the Credit Facility as of September 30, 2016 and December 31, 2015, respectively.

Availability of borrowings is based on a pool of eligible unencumbered real estate assets. On July 25, 2016, the Company extended the maturity date of the Credit Facility to July 25, 2017, with an additional one-year extension option remaining, for an extension fee of $1.5 million, subject to certain conditions.

The Company has the option, based upon its consolidated leverage ratio, to have draws under the Credit Facility priced at either the Alternate Base Rate (as described below) plus 0.60% to 1.20% or at Adjusted LIBOR (as described below) plus 1.60% to 2.20%. The Alternate Base Rate is defined in the Credit Facility as a rate per annum equal to the greatest of (a) the fluctuating annual rate of interest announced from time to time by the lender as its “prime rate” in effect on such day, (b) the federal funds effective rate in effect on such day plus half of 1% and (c) the Adjusted LIBOR for a one-month interest period on such day plus 1%. Adjusted LIBOR refers to LIBOR multiplied by the statutory reserve rate, as determined by the Federal Reserve System of the United States. The Credit Facility agreement requires the Company to pay an unused fee per annum of 0.25% if the unused balance of the Credit Facility exceeds or is equal to 50% of the available facility or a fee per annum of 0.15% if the unused balance of the Credit Facility is less than 50% of the available facility. As of September 30, 2016, the Credit Facility reflected variable and fixed rate borrowings with a carrying value and fair value of $671.0 million, and a weighted average effective interest rate of 2.4% after giving effect to interest rate swaps in place. The unused borrowing capacity under the Credit Facility as of September 30, 2016 and December 31, 2015 was $69.0 million and $22.7 million, respectively.

The Credit Facility agreement provides for quarterly interest payments for each Alternate Base Rate loan and periodic payments for each Adjusted LIBOR loan, based upon the applicable LIBOR loan period, with all principal outstanding being due on the extended maturity date in July 2017. The Credit Facility agreement may be prepaid at any time, in whole or in part, without premium or penalty, subject to prior notice to the lender. In the event of a default, the lender has the right to terminate their obligations under the Credit Facility agreement and to accelerate the payment on any unpaid principal amount of all outstanding loans. The Credit Facility requires the Company to meet certain financial covenants, including the maintenance of certain financial ratios (such as specified debt to equity and debt service coverage ratios) as well as the maintenance of a minimum net worth. As of September 30, 2016, the Company was in compliance with the financial covenants under the Credit Facility. In October 2016, the Company paid down $25.0 million of its US dollar advances.

The total gross carrying value of unencumbered assets as of September 30, 2016 was $1.5 billion.

A portion of foreign currency draws under the Credit Facility are designated as net investment hedges of the Company's investments during the periods reflected in the consolidated statements of operations (see Note 7 — Derivatives and Hedging Activities for further discussion).

Bridge Loan Facility

On August 8, 2016, in connection with the execution of the Merger Agreement, the OP entered into a bridge loan commitment letter, pursuant to which UBS Securities LLC and UBS AG, Stamford Branch agreed to provide a $150.0 million senior secured bridge loan facility (the "Bridge Loan Facility") for a term of 364 days from date of the merger transaction. Amounts drawn on the Bridge Loan Facility are subject to interest at LIBOR plus 3.25% per annum with a minimum floor of 4.00%. The margin rate of 3.25% per annum will increase by 0.75% 90 days after the date of funding and increases by 0.75% every 90 days thereafter with a maximum increase rate of 2.25%. The Bridge Loan Facility requires a 1.50% fee of the commitment amount upon execution and a fee equal to 0.375% of the commitments 180 days after signing. The Bridge Loan Facility is subject to a duration fee of 1.0% on outstanding draws 90 days after the date of funding. In addition, the Bridge Loan Facility requires a repayment fee of 0.5% on repayments made within 30 days of funding and a repayment fee of 1.0% fee on repayments made after 30 days after funding. The Bridge Loan Facility is subject to cross default provisions with the Company’s Credit Facility.