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Distribution Reinvestment Plan - Additional Information (Details) - shares	Dec. 31, 2018	Sep. 30, 2014
Distribution Reinvestment And Share Purchase Plan [Abstract]
Common shares registered with distribution reinvestment and share purchase Plan (2011 DRIP)		4,790,000
Number of shares available for issuance	4,676,606

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- Definition

Distribution Reinvestment and Share Purchase Plan.

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No definition available.

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- Definition

Represents the number of shares available for issuance under the company's dividend reinvestment plan at the balance sheet date.

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- Definition

Represents the number of shares authorized for issuance under the company's dividend reinvestment plan at the registration date.

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No definition available.

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