Debt - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Amortization of deferred financing fees	$ 2,709	$ 1,190	$ 5,368	$ 2,380
Other	1,656	1,855	3,787	3,601
Total interest expense	24,804	24,091	50,135	47,682
Convertible debt
Debt Instrument [Line Items]
Interest expense, debt	3,280	0	6,099	0
Senior unsecured notes
Debt Instrument [Line Items]
Interest expense, debt	1,020	1,198	2,272	2,396
Unsecured revolving credit facilities | Unsecured debt
Debt Instrument [Line Items]
Interest expense, debt	507	3,364	1,068	5,669
Unsecured term loan facilities | Unsecured debt
Debt Instrument [Line Items]
Interest expense, debt	$ 15,632	$ 16,484	$ 31,541	$ 33,636