Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 22,201
Accident Year 2016 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	11,750	$ 11,764	$ 11,764	$ 11,790	$ 13,056	$ 13,011	$ 13,297
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	11,681
Accident Year 2017 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 15,264	15,273	15,538	17,078	16,109	$ 15,748
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	12,306
Accident Year 2018 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 16,819	17,157	18,027	18,386	$ 19,580
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 0
Shortduration Insurance Contracts Number Of Reported Claims	12,182
Accident Year 2019 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 27,831	27,316	26,316	$ 22,138
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 1,663
Shortduration Insurance Contracts Number Of Reported Claims	12,026
Accident Year 2020 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 17,107	17,485	$ 20,671
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 3,653
Shortduration Insurance Contracts Number Of Reported Claims	11,530
Accident Year 2021 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 25,337	$ 28,982
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 5,809
Shortduration Insurance Contracts Number Of Reported Claims	14,150
Accident Year 2022 [Member]
Incurred claims development [Abstract]
Shortduration Insurance Contracts Incurred Claims And Allocated Claim Adjustment Expense Net	$ 27,570
Shortduration Insurance Contracts Incurred But Not Reported Ibnr Claims Liability Net	$ 11,076
Shortduration Insurance Contracts Number Of Reported Claims	12,860