Investments (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Real Estate [Line Items]
Real estate gains (losses)	$ 0	$ 3,385		$ 0	$ 6,888
Percentage of gains on bonds due to calls of securities	99.90%	89.40%		99.80%	72.60%
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Nursing Home Operations in Reno, Nevada
Real Estate [Line Items]
Real estate gains (losses)			$ 5,700
Nursing Home Operations, San Marcos, Texas
Real Estate [Line Items]
Real estate gains (losses)		$ (2,000)
Prior Home Office
Real Estate [Line Items]
Real estate gains (losses)		$ 3,200