Real Estate and Lending Activities - 2015 Activity - Additional Information (Detail) € in Millions, $ in Millions	Aug. 01, 2015 EUR (€) Property	Jun. 30, 2015 USD ($) Property Hospital	Jun. 16, 2015 USD ($) Bed Property	Apr. 29, 2015 EUR (€) Facility Hospital	Feb. 27, 2015 USD ($) Leases	Feb. 13, 2015 USD ($) RenewalOptions Facility	Jul. 31, 2015 EUR (€)	Jun. 30, 2015 EUR (€)	Dec. 31, 2014 EUR (€)
Subsequent Event [Member] | Acute Care Hospital [Member]
Significant Acquisitions and Disposals [Line Items]
Ownership percentage							50.00%
Purchase price of acquisition							€ 90
2015 [Member] | Acute Care Hospital [Member] | Kansas [Member]
Significant Acquisitions and Disposals [Line Items]
Term of lease, years						10 years
Term of lease extension, years						5 years
Number of facilities acquired | Facility						2
Purchase price of acquisition | $						$ 110.0
Number of lease extensions options in current lease contract | RenewalOptions						2,000,000
Mortgage financing | $						$ 40.0
Mortgage financing term						10 years
2015 [Member] | Ernest Health, Inc [Member]
Significant Acquisitions and Disposals [Line Items]
Acquisition costs | $			$ 31.5
Term of lease, years			20 years
Loans provided for acquisition | $			$ 12.0
Number of properties acquired | Property			2
2015 [Member] | Ernest Health, Inc [Member] | Minimum [Member]
Significant Acquisitions and Disposals [Line Items]
Term of lease extension, years			3 years
2015 [Member] | Ernest Health, Inc [Member] | Maximum [Member]
Significant Acquisitions and Disposals [Line Items]
Term of lease extension, years			5 years
2015 [Member] | Ernest Health, Inc [Member] | Rehabilitation Hospital with Covenant Health System [Member]
Significant Acquisitions and Disposals [Line Items]
Number of beds acquired | Bed			60
2015 [Member] | Ernest Health, Inc [Member] | Acute Care Hospital [Member]
Significant Acquisitions and Disposals [Line Items]
Number of beds acquired | Bed			37
2015 [Member] | Ernest Health, Inc [Member] | Inpatient Rehabilitation Hospital [Member] | Weslaco, Texas [Member]
Significant Acquisitions and Disposals [Line Items]
Acquisition costs | $					$ 10.7
Term of lease extension, years					5 years
Payments to fund long-term loans to related parties | $					$ 5.0
Lease remaining term					17 years
Number of lease extension options | Leases					3
2015 [Member] | Median Kliniken [Member]
Significant Acquisitions and Disposals [Line Items]
Number of hospitals acquired | Hospital		35		32
Acquisition costs				€ 688
Term of lease, years				27 years
Lease rate				9.30%
Lease rent increase percentage				70.00%
Number of facilities expected to acquire | Facility				3
Expected aggregate purchase price				€ 705
Ownership percentage									94.90%
Ownership percentage by others in Median									5.10%
Loans provided for acquisition								€ 240	€ 425
Number of properties closed | Property		17
Value of properties closed		$ 354.0						317
2015 [Member] | Median Kliniken [Member] | Subsequent Event [Member]
Significant Acquisitions and Disposals [Line Items]
Number of properties closed | Property	30
Value of properties closed	€ 627
2015 [Member] | Median and Waterland [Member]
Significant Acquisitions and Disposals [Line Items]
Loans provided for acquisition								€ 705