Reconciliation of Real Estate Properties and Accumulated Depreciation (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]
Percentage of minority ownership interests by parent			100.00%
CIP		$ 10,471
Henderson Medical Plaza | Scenario, Forecast
Real Estate and Accumulated Depreciation [Line Items]
CIP	$ 9,500
Universal Health Services
Real Estate and Accumulated Depreciation [Line Items]
Percentage of minority ownership interests by parent			100.00%