Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items]
Total long-term debt	$ 3,572,221	$ 3,640,180
Current portion	343,615	294,426
Total long-term debt, less current portion	3,228,606	3,345,754
Mortgage notes payable
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items]
Total long-term debt	3,513,386	3,579,931
Unamortized debt discount	$ 17,700	$ 18,600
Weighted average interest rate	4.77%	4.75%
Other notes payable
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items]
Total long-term debt	$ 58,835	$ 60,249
Weighted average interest rate	5.79%	5.85%