Debt - Components of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Amortization of deferred financing fees	$ 7,115	$ 2,565	$ 2,397
Other	9,931	2,327	1,187
Total interest expense	108,474	53,923	37,299
Senior unsecured notes
Debt Instrument [Line Items]
Interest expense, debt	4,792	4,686	4,805
Mortgage loans
Debt Instrument [Line Items]
Interest expense, debt	2,293	2,592	3,600
Unsecured revolving credit facilities | Unsecured debt
Debt Instrument [Line Items]
Interest expense, debt	4,530	11,274	3,914
Unsecured term loan facilities | Unsecured debt
Debt Instrument [Line Items]
Interest expense, debt	$ 79,813	$ 30,479	$ 21,396