Income Taxes - Reconciliation of Net Income to REIT Taxable Income Before Dividends Paid Deduction (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Net Income to REIT Taxable Income [Line Items]
Net income attributable to the Company	$ 32,397	$ 77,640	$ 251,491
Book/tax differences	91,144	588	(59,220)
REIT taxable income subject to 90% dividend requirement	$ 123,541	$ 78,228	$ 192,271
Annual distribution requirement to shareholders	90.00%