Commitments and Contingencies - Schedule Of Future Minimum Rental Revenues And Minimum Rental Payments (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Minimum Rental Revenues
2018	$ 569,936
2019	503,242
2020	434,410
2021	360,858
2022	279,232
Thereafter	792,050
Total future minimum rental revenues	2,939,728
Minimum Rental Payments
2018	3,887
2019	3,478
2020	3,112
2021	3,121
2022	2,978
Thereafter	117,703
Total future minimum rental payments	$ 134,279