Acquisitions and Dispositions of Real Estate Property - Estimated Fair Value (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Business Acquisition [Line Items] | |||
| Goodwill | $ 145,374 | $ 88,959 | $ 88,989 |
| Business Acquisitions, 2015 | |||
| Business Acquisition [Line Items] | |||
| Land and improvements | 38,361 | ||
| Buildings and improvements | 515,620 | ||
| Acquired lease intangibles | 14,138 | ||
| Goodwill | 56,275 | ||
| Other assets | 8,034 | ||
| Total assets acquired | 632,428 | ||
| Tenant deposits | 8,801 | ||
| Lease intangible liabilities | 3,729 | ||
| Accounts payable and other liabilities | 1,343 | ||
| Total liabilities assumed | 13,873 | ||
| Net assets acquired | 618,555 | ||
| American Realty Capital Healthcare Trust | |||
| Business Acquisition [Line Items] | |||
| Goodwill, Period Increase (Decrease) | $ (1,800) |