v3.19.1

Financial Highlights (Results of Operations for a Share Outstanding) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Increase (Decrease) Equity Per Share [Roll Forward]
Beginning Shareholders' Equity Per Share (12/31/2017)	$ 19.15
Net Investment Income	0.33
Net Realized/Unrealized Gains (Losses)	0.36
Results of Operations Attributable to Equity	0.69
Less: Results of Operations Attributable to Non-controlling Interests	(0.01)
Results of Operations Attributable to Shareholders' Equity	0.68
Dividends Paid to Common Shareholders	(0.41)
Accretive (Dilutive) Effect of Share Issuances (Net of Offering Costs), Share Repurchases, and Adjustments to Non-controlling Interest	0.14
Ending Shareholders' Equity Per Share (3/31/2018 and 3/31/2017, respectively)	$ 19.56
Shares Outstanding, end of period	30,392,041	29,745,776	29,796,601	31,335,938
Shareholders Equity Per Share Upon Conversion Of All Convertible Units (in usd per share)	$ 19.25

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The Company's equity per share if all the long term incentive plan units and Operating Partnership units (owned by the non-controlling interest) that have been previously been issued were to be fully vested and exchanged for common shares as of the reporting date.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Per share or unit amount of realized and unrealized gain (loss) on investment.

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