Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Subsequent Acquisitions From January 1, 2016 through February 24, 2016, we acquired 199 properties with an aggregate purchase price of approximately $26.6 million. We expect that our level of acquisition activity will fluctuate based on the number of suitable investments and on the level of funds available for investment. Borrowings on Credit Facility From January 1, 2016, through February 24, 2016, the Company borrowed an additional $70.0 million under the credit facility and made payments on the credit facility totaling $58.0 million, resulting in an outstanding loan balance of $12.0 million as of February 24, 2016. Share Repurchases From January 1, 2016, through February 24, 2016, the Company repurchased and retired 1.3 million of our Class A common shares at a weighted-average price of $15.43 per share and a total price of $20.5 million in accordance with our share repurchase program. Declaration of Dividends On February 25, 2016, our board of trustees declared quarterly dividends of $0.05 per Class A common share payable on March 31, 2016, to shareholders of record on March 15, 2016, and $0.05 per Class B common share payable on March 31, 2016, to shareholders of record on March 15, 2016. Additionally, our board of trustees also declared quarterly dividends of $0.3125 per share on the Company's 5.0% Series A Participating Preferred Shares payable on March 31, 2016, to shareholders of record on March 15, 2016, $0.3125 per share on the Company's 5.0% Series B Participating Preferred Shares payable on March 31, 2016, to shareholders of record on March 15, 2016, and $0.34375 per share on the Company's 5.5% Series C Participating Preferred shares payable on March 31, 2016, to shareholders of record on March 15, 2016. ARPI Shareholder Meeting Results On February 26, 2016, ARPI’s shareholders voted in favor of the Merger, which is subject to customary closing conditions. We anticipate the transaction to close on February 29, 2016.

Subsequent Events

Subsequent Acquisitions

From January 1, 2016 through February 24, 2016, we acquired 199 properties with an aggregate purchase price of approximately $26.6 million. We expect that our level of acquisition activity will fluctuate based on the number of suitable investments and on the level of funds available for investment.

Borrowings on Credit Facility

From January 1, 2016, through February 24, 2016, the Company borrowed an additional $70.0 million under the credit facility and made payments on the credit facility totaling $58.0 million, resulting in an outstanding loan balance of $12.0 million as of February 24, 2016.

Share Repurchases

From January 1, 2016, through February 24, 2016, the Company repurchased and retired 1.3 million of our Class A common shares at a weighted-average price of $15.43 per share and a total price of $20.5 million in accordance with our share repurchase program.

Declaration of Dividends

On February 25, 2016, our board of trustees declared quarterly dividends of $0.05 per Class A common share payable on March 31, 2016, to shareholders of record on March 15, 2016, and $0.05 per Class B common share payable on March 31, 2016, to shareholders of record on March 15, 2016. Additionally, our board of trustees also declared quarterly dividends of $0.3125 per share on the Company's 5.0% Series A Participating Preferred Shares payable on March 31, 2016, to shareholders of record on March 15, 2016, $0.3125 per share on the Company's 5.0% Series B Participating Preferred Shares payable on March 31, 2016, to shareholders of record on March 15, 2016, and $0.34375 per share on the Company's 5.5% Series C Participating Preferred shares payable on March 31, 2016, to shareholders of record on March 15, 2016.

ARPI Shareholder Meeting Results

On February 26, 2016, ARPI’s shareholders voted in favor of the Merger, which is subject to customary closing conditions. We anticipate the transaction to close on February 29, 2016.