Other Operating Expenses and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Operating Expenses and Other Expenses [Abstract]
Amortization of policy acquisition costs	$ 23,188	$ 23,403	$ 46,025	$ 44,878
Other underwriting expenses of the operating segments	16,960	14,522	36,310	32,372
Other operating expenses of the Corporate and Other segment	8,888	7,915	16,762	15,971
Total	49,036	45,840	99,097	93,221
Other expenses	$ 0	$ 904	$ 368	$ 1,525