Purchased Minority Ownership Interest (Detail)	12 Months Ended
	Dec. 31, 2016	Aug. 01, 2014
Palmdale Medical Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	95.00%
Property Owned by LLC	Palmdale Medical Plaza
Effective Date	Jan. 01, 2014
Sparks Medical Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	95.00%
Property Owned by LLC	Vista Medical Terrace & Sparks MOB
Effective Date	Jan. 01, 2014
DVMC Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	90.00%	90.00%
Property Owned by LLC	Desert Valley Medical Center
Effective Date	Aug. 01, 2014
Santa Fe Scottsdale
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	90.00%	90.00%
Property Owned by LLC	Santa Fe Professional Plaza
Effective Date	Aug. 01, 2014
PCH Medical Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	85.00%	85.00%
Property Owned by LLC	Rosenberg Children’s Medical Plaza
Effective Date	Aug. 01, 2014
Sierra Medical Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	95.00%	95.00%
Property Owned by LLC	Sierra San Antonio Medical Plaza
Effective Date	Aug. 01, 2014
PCH Southern Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	95.00%	95.00%
Property Owned by LLC	Phoenix Children’s East Valley Care Center
Effective Date	Aug. 01, 2014
3811 Bell Medical Properties
Business Acquisition [Line Items]
Ownership prior to minority interest purchase	95.00%	95.00%
Property Owned by LLC	3811 E. Bell
Effective Date	Aug. 01, 2014