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Real Estate (Damages) (Details) - Hurricane Michael ft² in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)	Oct. 07, 2018 ft² property
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Number of properties effected in catastrophic event \| property		2
GLA of properties effected \| ft²		0.4
Properties effected, accelerated depreciation	$ 13.7
Proceeds from property insurance	3.0
Receivables
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Property insurance receivable	$ 10.7