Goodwill	3 Months Ended
Goodwill	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The Company's Independent Living and Health Care Services segments had a carrying value of goodwill of $27.3 million and $126.8 million, respectively, as of both March 31, 2020 and December 31, 2019. Goodwill is tested for impairment annually with a test date of October 1 and sooner if indicators of impairment are present. Factors the Company considers important in its analysis, which could trigger an impairment of such assets, include significant underperformance relative to historical or projected future operating results, significant negative industry or economic trends, and a significant decline in the Company's stock price and market capitalization for a sustained period. During the three months ended March 31, 2020, the Company identified qualitative indicators of impairment of goodwill, including the COVID-19 pandemic and a significant decline in the Company's stock price and market capitalization for a sustained period during the three months ended March 31, 2020. The pandemic and related infection prevention and control protocols within senior living communities have significantly disrupted demand for senior living communities and the sales process, which typically includes in-person prospective resident visits at communities. The Company believes potential residents and their families are more cautious regarding moving into senior living communities while the pandemic continues, and such caution may persist for some time. The Company cannot predict with reasonable certainty whether or when demand for senior living communities will return to pre-COVID-19 levels or the extent to which the pandemic’s effect on demand may adversely affect the amount of resident fees it is able to collect from its residents. Refer to Note 16 for additional information on the COVID-19 pandemic. As a result of the COVID-19 pandemic, the Company performed an interim quantitative goodwill impairment test as of March 31, 2020. The Company’s quantitative goodwill impairment test as of March 31, 2020 included reduced estimates of projected future cash flows as a result of changes to significant assumptions using information known or knowable about the COVID-19 pandemic, including current industry and economic trends, changes in business plans, and changes in expected revenue and facility operating expense growth rates. Additionally, the Company considered the additional risk within the future cash flow estimates when selecting risk-adjusted discount rates. The Company determined no impairment was necessary for the three months ended March 31, 2020. Determining the fair value of the Company’s reporting units involves the use of significant estimates and assumptions that are unpredictable and inherently uncertain. These estimates and assumptions include revenue and expense growth rates and operating margins used to calculate projected future cash flows and risk-adjusted discount rates. Future events may indicate differences from management's current judgments and estimates which could, in turn, result in future impairments. Future events that may result in impairment charges include differences in the projected occupancy rates or monthly service fee rates, changes in the cost structure of existing communities, changes in reimbursement rates from Medicare for healthcare services, and changes in healthcare reform. Significant adverse changes in the Company’s future revenues and/or operating margins, significant changes in the market for senior housing or the valuation of the real estate of senior living communities, as well as other events and circumstances, including but not limited to increased competition, changes in reimbursement rates from Medicare for healthcare services, and changing economic or market conditions, including market control premiums, could result in changes in fair value and the determination that goodwill is impaired.