Real Estate and Lending Activities - Development Activities - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions	1 Months Ended	9 Months Ended
Apr. 30, 2017 GBP (£)	Sep. 30, 2017 USD ($) Facility	Sep. 30, 2017 EUR (€) Facility
Birmingham, England
Business Acquisition [Line Items]
Purchase price of acquisition	£ 2.7
Term of lease, years	15 years
Total development costs anticipated	£ 30.0
Development Activities [Member] \| Adeptus Health [Member] \| Acute Care Facilities [Member]
Business Acquisition [Line Items]
Number of facilities constructed \| Facility		4	4
Acquisition costs \| $		$ 68
Development Activities [Member] \| IMED [Member] \| Acute Care Facilities [Member] \| Spain [Member]
Business Acquisition [Line Items]
Acquisition costs \| €			€ 21
Ownership interests acquired		50.00%	50.00%
Lease rate		12.20%	12.20%
Lessor direct financing lease description		Quarterly fixed rent payments beginning six months from the lease start date with annual increases of 1% beginning April 1, 2020.	Quarterly fixed rent payments beginning six months from the lease start date with annual increases of 1% beginning April 1, 2020.
Lease rent increase percentage		1.00%	1.00%

Lease agreement interest percentage.

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- Definition

Number of facilities constructed.

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- Definition

Percentage of increase in lease rent.

+ References

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The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The capitalized costs incurred during the period (excluded from amortization) to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing the oil and gas.

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Description of lessee's operating lease.

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Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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