Real Estate Activities - Minimum Rental Payments Due over the Remaining Lease Term under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases User Charges And Commitments [Line Items]
2019	$ 6,602
2020	6,903
2021	6,841
2022	6,838
2023	6,861
Thereafter	198,932
Minimum rental payments, total	232,977
Minimum [Member]
Leases User Charges And Commitments [Line Items]
2019	498,513
2020	503,295
2021	513,193
2022	519,539
2023	528,058
Thereafter	11,156,465
Minimum rental payments, total	13,719,063
Minimum [Member] \| Operating Leases [Member]
Leases User Charges And Commitments [Line Items]
2019	433,542
2020	437,025
2021	445,598
2022	450,592
2023	457,732
Thereafter	9,612,430
Minimum rental payments, total	11,836,919
Minimum [Member] \| Direct Financing Leases [Member]
Leases User Charges And Commitments [Line Items]
2019	64,971
2020	66,270
2021	67,595
2022	68,947
2023	70,326
Thereafter	1,544,035
Minimum rental payments, total	$ 1,882,144

Leases User Charges And Commitments [Line Items]

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
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-SubTopic 20
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

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- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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