Leases - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) property	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Lessor, Lease, Description [Line Items]
Number of Properties | property	3,951
Weighted average remaining lease term	16 years 7 months 6 days
Weighted average discount rate	4.92%
Operating lease right-of-use asset, initial measurement			$ 233,300
Operating lease liability, initial measurement			236,300
Operating lease right-of-use assets	$ 221,798		0
Operating lease liabilities	$ 225,972		$ 0
Minimum [Member]
Lessor, Lease, Description [Line Items]
Lease terms	14 days
Remaining lease terms	6 months
Maximum [Member]
Lessor, Lease, Description [Line Items]
Lease terms	25 years 7 months 6 days
Remaining lease terms	80 years 1 month 6 days
Accounting Standards Update 2016-02 [Member]
Lessor, Lease, Description [Line Items]
Operating lease right-of-use assets		$ 2,800
Operating lease liabilities		$ 3,100