Real Estate and Lending Activities - Summary of Status Update on Current Development Projects (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Commitment	$ 48,091
Costs Incurred as of 03/31/2017	14,941
Adeptus Health Three [Member]
Business Acquisition [Line Items]
Commitment	12,220
Costs Incurred as of 03/31/2017	$ 7,939
Estimated Completion Date	2Q 2017
Ernest [Member]
Business Acquisition [Line Items]
Commitment	$ 28,067
Costs Incurred as of 03/31/2017	$ 5,231
Estimated Completion Date	4Q 2017
Adeptus Health Four [Member]
Business Acquisition [Line Items]
Commitment	$ 7,804
Costs Incurred as of 03/31/2017	$ 1,771
Estimated Completion Date	1Q 2018