Subsequent Events Subsequent Events (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 29, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Subsequent Event [Line Items]
Policyholder benefits and claims incurred, net, property, casualty and liability		$ 752,134	$ 736,846	$ 2,118,000	$ 1,951,142
Minimum [Member] | Typhoon Hagibis [Member] | Subsequent event [Member]
Subsequent Event [Line Items]
Policyholder benefits and claims incurred, net, property, casualty and liability	$ 60,000
Maximum [Member] | Typhoon Hagibis [Member] | Subsequent event [Member]
Subsequent Event [Line Items]
Policyholder benefits and claims incurred, net, property, casualty and liability	$ 120,000