Reserves for Losses and Loss Adjustment Expenses (Incurred and Paid Claims Development - Personal Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) claim	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development	$ 112,300	$ 6,000
Incurred claims and claim adjustment expenses related to current year	117,644	151,603
Total incurred	323,499	275,244
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Total paid	292,089	279,046
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	460,176	428,766	$ 432,568
Personal Segment [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total incurred	381,005
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Total paid	359,157
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	21,848
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2013 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		60,299	60,286	$ 60,310	$ 60,328	$ 60,379	$ 60,211	$ 60,100	$ 59,132	$ 55,706
Incurred claims and claim adjustment expenses related to current year	$ 60,305
Cumulative number of reported claims	23,472
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		60,291	60,279	60,279	60,297	60,277	59,775	58,047	54,514	$ 45,901
Paid claims and allocated claim adjustment expenses related to current year	$ 60,302
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2014 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		6,580	6,578	6,518	6,504	6,699	6,243	5,340	5,452
Incurred claims and claim adjustment expenses related to current year	$ 6,582
Cumulative number of reported claims | claim	19,293
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		6,585	6,583	6,580	6,566	6,428	5,631	4,418	$ 2,515
Paid claims and allocated claim adjustment expenses related to current year	$ 6,585
Personal Segment [Member] | Loss Adjustment Expenses Recognized in 2015 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		25,194	25,185	25,102	25,136	25,307	25,682	23,104
Incurred claims and claim adjustment expenses related to current year	$ 25,210
Cumulative number of reported claims | claim	23,376
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		25,191	25,169	25,098	25,243	24,262	22,281	$ 11,570
Paid claims and allocated claim adjustment expenses related to current year	$ 25,211
Personal Segment [Member] | Loss Adjustment Expenses Recognized in 2016 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		33,193	33,042	32,803	32,728	32,893	32,260
Incurred claims and claim adjustment expenses related to current year	$ 33,271
Cumulative number of reported claims | claim	23,759
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		33,141	32,991	32,777	32,260	30,646	$ 21,669
Paid claims and allocated claim adjustment expenses related to current year	$ 33,231
Personal Segment [Member] | Loss Adjustment Expenses Recognized in 2017 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		22,768	22,547	21,926	21,968	23,342
Incurred claims and claim adjustment expenses related to current year	$ 22,770
Cumulative number of reported claims | claim	16,820
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		22,762	22,488	21,972	21,061	$ 15,776
Paid claims and allocated claim adjustment expenses related to current year	$ 22,776
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2018 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		20,139	19,972	18,353	18,334
Incurred claims and claim adjustment expenses related to current year	20,220
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 13
Cumulative number of reported claims | claim	15,337
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		19,983	19,628	18,009	$ 11,137
Paid claims and allocated claim adjustment expenses related to current year	$ 20,133
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2019 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		64,677	63,722	56,009
Incurred claims and claim adjustment expenses related to current year	65,494
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ (288)
Cumulative number of reported claims | claim	25,751
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		64,885	60,870	$ 41,524
Paid claims and allocated claim adjustment expenses related to current year	$ 65,628
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2020 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		50,820	47,938
Incurred claims and claim adjustment expenses related to current year	51,750
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 530
Cumulative number of reported claims | claim	18,535
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		48,281	$ 32,746
Paid claims and allocated claim adjustment expenses related to current year	$ 50,841
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2021 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable net prior year development		45,295
Incurred claims and claim adjustment expenses related to current year	49,851
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 540
Cumulative number of reported claims | claim	15,795
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		$ 30,435
Paid claims and allocated claim adjustment expenses related to current year	$ 46,707
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2022 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Incurred claims and claim adjustment expenses related to current year	45,552
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 10,299
Cumulative number of reported claims | claim	14,651
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to current year	$ 27,743