Reserves for Losses and Loss Adjustment Expenses (Incurred and Paid Claims Development - Personal Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) claim	Dec. 31, 2020 USD ($)	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 ($)	Dec. 31, 2012 USD ($)
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development	$ 6,040	$ 58,288
Incurred claims and claim adjustment expenses related to current year	269,204	326,919
Total incurred	275,244	406,907
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years	177,571	185,407
Paid claims and allocated claim adjustment expenses related to current year	101,475	113,312
Total paid	279,046	320,419
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	428,766	432,568	$ 346,080
Loss Adjustment Expenses Recognized In 2012 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years										$ 1,181
Personal Segment [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development	4,891	9,123
Total incurred	401,093
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Total paid	383,700
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	17,393
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2012 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		72,123	72,100	$ 72,076	$ 72,037	$ 72,042	$ 71,513	$ 70,552	$ 73,795	58,604
Incurred claims and claim adjustment expenses related to current year	$ 72,128
Cumulative number of reported claims	23,940
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		72,138	72,124	72,094	72,055	71,995	70,807	68,849	64,278	$ 37,860
Paid claims and allocated claim adjustment expenses related to current year	$ 72,146
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2013 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		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	$ 60,299
Cumulative number of reported claims | claim	23,472
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		60,279	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	$ 60,291
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2014 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		6,578	6,518	6,504	6,699	6,243	5,340	5,452
Incurred claims and claim adjustment expenses related to current year	$ 6,580
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		6,583	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 (favorable) net prior year development		25,185	25,102	25,136	25,307	25,682	23,104
Incurred claims and claim adjustment expenses related to current year	$ 25,194
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		25,169	25,098	25,243	24,262	22,281	$ 11,570
Paid claims and allocated claim adjustment expenses related to current year	$ 25,191
Personal Segment [Member] | Loss Adjustment Expenses Recognized in 2016 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		33,042	32,803	32,728	32,893	32,260
Incurred claims and claim adjustment expenses related to current year	$ 33,193
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		32,991	32,777	32,260	30,646	$ 21,669
Paid claims and allocated claim adjustment expenses related to current year	$ 33,141
Personal Segment [Member] | Loss Adjustment Expenses Recognized in 2017 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		22,547	21,926	21,968	23,342
Incurred claims and claim adjustment expenses related to current year	$ 22,768
Cumulative number of reported claims | claim	16,818
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		22,488	21,972	21,061	$ 15,776
Paid claims and allocated claim adjustment expenses related to current year	$ 22,762
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2018 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		19,972	18,353	18,334
Incurred claims and claim adjustment expenses related to current year	20,139
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 18
Cumulative number of reported claims | claim	15,332
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		19,628	18,009	$ 11,137
Paid claims and allocated claim adjustment expenses related to current year	$ 19,983
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2019 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		63,722	56,009
Incurred claims and claim adjustment expenses related to current year	64,677
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ (770)
Cumulative number of reported claims | claim	25,728
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		60,870	$ 41,524
Paid claims and allocated claim adjustment expenses related to current year	$ 64,885
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2020 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Total unfavorable (favorable) net prior year development		47,938
Incurred claims and claim adjustment expenses related to current year	50,820
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 404
Cumulative number of reported claims | claim	18,429
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to prior years		$ 32,746
Paid claims and allocated claim adjustment expenses related to current year	$ 48,281
Personal Segment [Member] | Loss Adjustment Expenses Recognized In 2021 [Member]
Liability For Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Incurred claims and claim adjustment expenses related to current year	45,295
Total of incurred-but-not-reported liabilities plus expected development on reported claims	$ 7,690
Cumulative number of reported claims | claim	14,671
Liability For Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Paid claims and allocated claim adjustment expenses related to current year	$ 30,435