Related Party Transactions 1347 Property Insurance Holdings, Inc. (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2014
Clause 2 [Member]
Related Party Transaction [Line Items]
Share Price				$ 12.00
Clause 3 [Member]
Related Party Transaction [Line Items]
Share Price				15.00
Management [Member]
Related Party Transaction [Line Items]
Sale of Stock, Consideration Received on Transaction	$ 1.0	$ 0.3	$ 0.3
Minimum [Member]
Related Party Transaction [Line Items]
Share Price				10.00
Maximum [Member]
Related Party Transaction [Line Items]
Share Price				$ 18.00