Operating Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) project lease state
Property Subject to or Available for Operating Lease [Line Items]
Number of real estate properties | project	104
Number of states in which entity has properties | state	12
Number of leases | lease	3,000
Percent of annualized base rent	2.90%
Operating Leases, Future Minimum Payments Receivable [Abstract]
2018	$ 593,461
2019	537,822
2020	474,369
2021	401,869
2022	328,302
Thereafter	1,402,509
Total	$ 3,738,332
Retail and commercial | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, term	3 years
Retail and commercial | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, term	10 years
Residential | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, term	1 year