Equity (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended		36 Months Ended	129 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Oct. 16, 2015	Jun. 30, 2023	Dec. 31, 2022	Mar. 03, 2020
Equity [Line Items]
Common stock, shares sold	36,196,116		36,196,116		33,534,022	36,196,116	36,184,058
Proceeds from offering					$ 834,399,000
Common stock, shares outstanding	36,196,116		36,196,116			36,196,116	36,184,058
Distribution reinvestment plan, shares						6,328,924
Shares repurchased through the share repurchase program						3,682,219
Distribution reinvested	$ 1,747,000	$ 1,822,000	$ 3,522,000	$ 3,671,000
Stock repurchase program, amount	1,751,000	911,000	2,641,000	1,835,000
Other liabilities	9,976,000		$ 9,976,000			$ 9,976,000	$ 8,574,000
Third Amended and Restated Share Repurchase Program [Member]
Equity [Line Items]
Limit on share repurchases as a percentage of proceeds of the distribution reinvestment program			50.00%
Description of share repurchase program			Under the Third SRP, the Company is authorized to make ordinary repurchases and Exceptional Repurchases at a price equal to 80.0% of the “share price,” which is defined in the Third SRP as an amount equal to the lesser of: (A) $25, as adjusted under certain circumstances, including, among other things, if the applicable shares were purchased from the Company at a discounted price; of (B) the most recently disclosed estimated value per share. Prior to the amendment, the Company was authorized to make Exceptional Repurchases at a price equal to 100% of the “share price.”
Third Amended and Restated Share Repurchase Program [Member] | Exceptional Repurchases [Member]
Equity [Line Items]
Percentage of share price on repurchase of shares								80.00%
Prior Share Repurchase Agreement [Member] | Exceptional Repurchases [Member]
Equity [Line Items]
Percentage of share price on repurchase of shares								100.00%
Stock Repurchase Program [Member]
Equity [Line Items]
Other liabilities	0		$ 0			$ 0	$ 0
Minimum [Member]
Equity [Line Items]
Stock repurchase program, to be held			1 year
Maximum [Member] | Third Amended and Restated Share Repurchase Program [Member]
Equity [Line Items]
Stock repurchase program per share amount								$ 25
Percentage of prior fiscal year end outstanding shares that may be repurchased			5.00%
DRP [Member]
Equity [Line Items]
Distribution reinvested	$ 1,747,000	$ 1,822,000	$ 3,522,000	$ 3,671,000