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Real Estate Properties (Details) ft² in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2017 USD ($) ft² | Jan. 31, 2017 USD ($) ft² living_unit | Jan. 31, 2017 USD ($) ft² building | Jan. 31, 2017 USD ($) ft² | Jan. 31, 2017 USD ($) ft² property | Mar. 31, 2017 USD ($) state building property | Mar. 31, 2016 USD ($)
Real Estate Properties |  |  |  |  |  |  |
Number of properties owned | property |  |  |  |  |  | 434 |
Number of buildings owned | building |  |  |  |  |  | 460 |
Number of states in which properties are located | state |  |  |  |  |  | 42 |
Impairment of assets |  |  |  |  |  | $ 0 | $ 7,390
Acquisition |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |
Weighted average amortization period | 10 years 3 months 18 days |  |  |  |  |  |
Kansas | Acquisition | MOBs |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |
Number of properties |  | 1 |  |  | 1 |  |
Number of buildings acquired | building |  |  | 1 |  |  |  |
Area of real estate properties (in square feet) | ft² | 117 | 117 | 117 | 117 | 117 |  |
Purchase price including closing costs and working capital adjustments |  |  |  | $ 15,106 |  |  |
Acquisition and certain other transaction related costs |  |  |  | 35 |  |  |
Real estate properties, acquired intangible lease assets | $ 6,338 | $ 6,338 | $ 6,338 | 6,338 | $ 6,338 |  |
Real estate properties acquired, intangible lease liabilities | $ 0 | $ 0 | $ 0 | 0 | $ 0 |  |
Assumption of mortgage notes payable |  |  |  | 0 |  |  |
Premium on assumed debt |  |  |  | 0 |  |  |
Kansas | Land | Acquisition | MOBs |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |
Real estate properties acquired, property plant and equipment |  |  |  | 1,522 |  |  |
Kansas | Building improvements | Acquisition | MOBs |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |
Real estate properties acquired, property plant and equipment |  |  |  | $ 7,246 |  |  |

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