Subsequent Events (Details) - USD ($)	1 Months Ended
	Aug. 07, 2019	Jun. 30, 2019	Jan. 31, 2019
Subsequent Event
Subsequent Event [Line Items]
Extinguishment of debt, amount	$ 21,408,000
Unsecured Term Loan | Unsecured Term Loan, Expiring January 2021
Subsequent Event [Line Items]
Face amount of debt instrument		$ 300,000,000	$ 300,000,000
Unsecured Term Loan | Unsecured Term Loan, Expiring January 2021 | Subsequent Event
Subsequent Event [Line Items]
Stated interest rate	2.732%