Reserves for Unpaid Losses and Loss Adjustment Expenses (Activity in the Reserves for Unpaid Losses and Loss Adjustment Expense) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Beginning balance	$ 880,869	$ 816,681
Less reinsurance recoverable	420,693	387,915
Net balance beginning	460,176	428,766
Incurred related to:
Prior years	11,600	55,193
Total incurred	61,529	175,957
Paid related to:
Total paid	156,816	133,929
Net ending balance	364,889	470,794
Plus reinsurance recoverable	419,957	377,413
Ending balance	784,846	848,207
Continuing Operations
Incurred related to:
Current year	54,916	56,835
Prior years	11,600	55,193
Total incurred	66,516	112,028
Paid related to:
Current year	21,431	24,139
Prior years	80,988	59,362
Total paid	102,419	83,501
Discontinued Operations
Incurred related to:
Current year	2,733	55,848
Prior years	(7,720)	8,081
Total incurred	(4,987)	63,929
Paid related to:
Current year	2,367	8,629
Prior years	52,030	41,799
Total paid	$ 54,397	$ 50,428