Subsequent Events - Summary of Hospitals in Acquisition Portfolio (Detail) - Subsequent Event [Member]	Jul. 31, 2015 Bed
Business Acquisition [Line Items]
Total Licensed Beds	1,169
Capital Medical Center [Member] | Olympia, WA [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	110
EASTAR Health System [Member] | Muskogee, OK [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	320
Carolina Pines Regional Medical Center [Member] | Hartsville, SC [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	116
St. Mary's Regional Medical Center [Member] | Russellville, AR [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	170
National Park Medical Center [Member] | Hot Springs, AR [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	166
Southwestern Medical Center [Member] | Lawton, OK [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	199
Willamette Valley Medical Center [Member] | McMinnville, OR [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Licensed Beds	88