Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and ContingenciesAt March 31, 2019, we had 14 outstanding letter of credit obligations totaling $49,439,000 and expiring between 2019 and 2024. At March 31, 2019, we had outstanding construction in progress of $253,478,000 and were committed to providing additional funds of approximately $526,306,000 to complete construction. Purchase obligations at March 31, 2019, include 1,250,000,000 representing a definitive agreement to acquire outpatient medical facilities in 2019. Purchase obligations also include contingent purchase obligations totaling $20,913,000. These contingent purchase obligations relate to unfunded capital improvement obligations and contingent obligations on acquisitions. Rents due from the tenant are increased to reflect the additional investment in the property.