Shareholders' Equity - Schedule of Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Annual Per Share Distribution (in dollars per share)	$ 0.84	$ 1.56	$ 1.56
Total Distribution	$ 199,719	$ 370,746	$ 370,608
Ordinary Income	0.00%	38.10%	89.20%
Capital Gain	25.70%	61.90%	10.80%
Return of Capital	74.30%	0.00%	0.00%