Loss and Loss Adjustment Expense Reserves - Incurred and paid claims development (Details)	Dec. 31, 2020 USD ($) claim	Dec. 31, 2019 USD ($)	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 ($)	Dec. 31, 2011 USD ($)
incurred and paid claims development
Liabilities for claims and claims adjustment expenses, net of reinsurance	$ 431,677,000
Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	1,695,672,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	1,520,094,000
All outstanding liabilities before 2011, net of reinsurance	411,000
Liabilities for claims and claims adjustment expenses, net of reinsurance	175,989,000
Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	1,183,649,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	1,189,929,000
Liabilities for claims and claim adjustment expenses, net of reinsurance	(6,282,000)
Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	343,397,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	252,037,000
All outstanding liabilities before 2011, net of reinsurance	89,000
Liabilities for claims and claims adjustment expenses, net of reinsurance	91,449,000
Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	160,225,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	158,675,000
Liabilities for claims and claims adjustment expenses, net of reinsurance	1,551,000
Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	86,363,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	43,481,000
All outstanding liabilities before 2011, net of reinsurance	0
Liabilities for claims and claims adjustment expenses, net of reinsurance	42,882,000
Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	761,200,000
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	709,982,000
All outstanding liabilities before 2011, net of reinsurance	89,000
Liabilities for claims and claims adjustment expenses, net of reinsurance	51,307,000
2011 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 168,545,000	$ 168,625,000	$ 168,671,000	$ 170,732,000	$ 171,852,000	$ 172,957,000	$ 175,209,000	$ 176,906,000	$ 176,906,000	$ 176,727,000
Cumulative Number of Reported claims | claim	56,124
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 168,527,000	168,593,000	168,585,000	168,025,000	167,251,000	164,413,000	158,904,000	146,532,000	130,018,000	76,467,000
2011 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 113,597,000	113,630,000	113,640,000	113,677,000	113,674,000	113,765,000	113,821,000	115,028,000	117,951,000	118,131,000
Cumulative Number of Reported claims | claim	140,509
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 113,597,000	113,630,000	113,640,000	113,669,000	113,673,000	113,719,000	113,809,000	114,451,000	117,152,000	126,196,000
2011 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	22,485,000	22,488,000	22,759,000	22,817,000	22,933,000	23,649,000	24,187,000	24,160,000	24,298,000	23,658,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 22,000
Cumulative Number of Reported claims	4,958
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 22,463,000	22,463,000	22,445,000	22,043,000	21,913,000	20,941,000	19,783,000	17,807,000	14,263,000	7,306,000
2011 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 11,048,000	11,048,000	11,024,000	10,952,000	10,910,000	10,952,000	10,960,000	11,031,000	11,151,000	11,511,000
Cumulative Number of Reported claims | claim	11,488
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 11,048,000	11,048,000	11,049,000	11,050,000	11,053,000	11,055,000	11,060,000	11,092,000	11,119,000	11,006,000
2011 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 4,846,000	4,845,000	4,845,000	5,546,000	6,017,000	6,923,000	7,531,000	7,644,000	7,644,000	6,260,000
Cumulative Number of Reported claims | claim	304
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 4,770,000	4,769,000	4,769,000	4,758,000	4,536,000	4,497,000	4,336,000	3,459,000	1,969,000	235,000
2011 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	92,385,000	92,387,000	92,388,000	92,595,000	93,186,000	93,914,000	94,657,000	97,571,000	98,021,000	95,586,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 204,000
Cumulative Number of Reported claims | claim	15,116
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 92,180,000	92,182,000	92,182,000	92,182,000	92,333,000	92,444,000	92,462,000	92,184,000	89,742,000	$ 71,532,000
2012 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	162,520,000	162,448,000	163,350,000	166,008,000	167,831,000	170,379,000	174,856,000	175,189,000	175,262,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (7,000)
Cumulative Number of Reported claims | claim	53,273
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 162,121,000	162,014,000	161,749,000	160,416,000	157,443,000	152,991,000	144,157,000	126,553,000	74,306,000
2012 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 103,453,000	103,491,000	103,510,000	103,547,000	103,575,000	103,679,000	104,393,000	107,912,000	108,376,000
Cumulative Number of Reported claims | claim	123,639
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 103,452,000	103,491,000	103,510,000	103,537,000	103,573,000	103,664,000	104,311,000	107,017,000	111,928,000
2012 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	22,292,000	22,476,000	22,859,000	23,819,000	24,572,000	24,723,000	24,662,000	24,447,000	23,704,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 150,000
Cumulative Number of Reported claims	4,566
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 22,121,000	22,086,000	21,021,000	20,601,000	18,876,000	17,804,000	15,617,000	12,474,000	6,503,000
2012 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 10,224,000	10,226,000	10,209,000	10,208,000	10,250,000	10,249,000	10,331,000	10,382,000	10,382,000
Cumulative Number of Reported claims | claim	9,913
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 10,224,000	10,226,000	10,228,000	10,235,000	10,239,000	10,242,000	10,270,000	10,553,000	9,707,000
2012 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 3,646,000	3,889,000	3,824,000	4,331,000	5,304,000	6,464,000	7,514,000	7,514,000	7,514,000
Cumulative Number of Reported claims | claim	249
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 3,646,000	3,646,000	3,606,000	3,600,000	3,029,000	2,731,000	2,308,000	2,063,000	1,389,000
2012 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	41,887,000	41,887,000	41,895,000	42,382,000	43,097,000	44,380,000	47,392,000	49,911,000	50,351,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 148,000
Cumulative Number of Reported claims | claim	6,051
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 41,737,000	41,736,000	41,736,000	41,789,000	41,782,000	41,737,000	41,960,000	40,681,000	$ 30,801,000
2013 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	175,718,000	175,684,000	176,713,000	179,167,000	181,492,000	183,264,000	183,517,000	183,367,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (194,000)
Cumulative Number of Reported claims | claim	54,248
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 174,574,000	173,890,000	172,736,000	169,634,000	163,694,000	152,472,000	135,031,000	79,049,000
2013 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 112,003,000	112,029,000	112,060,000	112,096,000	112,197,000	113,034,000	114,239,000	114,389,000
Cumulative Number of Reported claims | claim	131,703
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 112,003,000	112,029,000	112,060,000	112,085,000	112,162,000	112,894,000	115,904,000	120,843,000
2013 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	25,353,000	25,443,000	25,986,000	26,310,000	26,864,000	28,377,000	29,541,000	29,175,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 167,000
Cumulative Number of Reported claims	5,784
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 24,732,000	24,507,000	23,867,000	22,434,000	21,129,000	19,625,000	17,079,000	8,502,000
2013 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	$ 13,057,000	13,071,000	13,047,000	13,057,000	13,180,000	13,298,000	13,567,000	13,666,000
Cumulative Number of Reported claims | claim	12,298
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 13,057,000	13,066,000	13,060,000	13,065,000	13,074,000	13,114,000	13,378,000	12,665,000
2013 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	5,147,000	5,147,000	5,312,000	5,978,000	7,578,000	9,337,000	9,768,000	9,768,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 7,000
Cumulative Number of Reported claims | claim	264
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 4,247,000	4,209,000	4,038,000	3,829,000	3,493,000	3,080,000	2,337,000	527,000
2013 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	49,456,000	49,463,000	49,973,000	51,077,000	52,464,000	55,722,000	56,199,000	56,298,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 126,000
Cumulative Number of Reported claims | claim	5,698
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 49,327,000	49,328,000	49,620,000	49,653,000	49,612,000	49,702,000	48,456,000	$ 38,661,000
2014 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	179,267,000	179,251,000	181,312,000	183,119,000	186,798,000	187,104,000	187,305,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (1,388,000)
Cumulative Number of Reported claims | claim	52,787
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 177,360,000	176,616,000	173,163,000	166,815,000	156,693,000	136,434,000	79,151,000
2014 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	122,188,000	122,213,000	122,341,000	122,327,000	122,410,000	123,622,000	123,421,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (28,000)
Cumulative Number of Reported claims | claim	135,006
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 122,216,000	122,251,000	122,350,000	122,402,000	122,668,000	126,414,000	130,732,000
2014 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	32,200,000	32,438,000	32,948,000	33,914,000	34,376,000	34,105,000	34,117,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (68,000)
Cumulative Number of Reported claims	6,085
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 31,298,000	30,420,000	27,886,000	25,253,000	21,968,000	17,853,000	9,426,000
2014 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	15,373,000	15,381,000	15,353,000	15,419,000	15,455,000	16,925,000	17,426,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 0
Cumulative Number of Reported claims | claim	13,545
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 15,373,000	15,376,000	15,381,000	15,388,000	15,424,000	15,862,000	15,377,000
2014 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	6,984,000	6,984,000	7,120,000	7,388,000	9,738,000	11,494,000	11,494,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 118,000
Cumulative Number of Reported claims | claim	261
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 6,368,000	6,315,000	4,828,000	4,200,000	3,212,000	1,834,000	340,000
2014 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	54,602,000	54,607,000	55,127,000	57,331,000	59,751,000	60,213,000	59,160,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 268,000
Cumulative Number of Reported claims | claim	6,077
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 54,306,000	54,274,000	54,262,000	54,224,000	54,088,000	52,161,000	$ 40,409,000
2015 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	179,451,000	181,299,000	184,477,000	188,317,000	190,236,000	190,036,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (698,000)
Cumulative Number of Reported claims | claim	52,978
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 176,652,000	173,816,000	168,641,000	156,483,000	138,255,000	76,934,000
2015 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	133,530,000	133,581,000	133,737,000	134,101,000	136,661,000	140,219,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (66,000)
Cumulative Number of Reported claims | claim	144,274
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 133,596,000	133,639,000	133,701,000	134,066,000	136,760,000	143,532,000
2015 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	38,257,000	38,015,000	37,730,000	36,610,000	36,150,000	35,371,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (58,000)
Cumulative Number of Reported claims	7,212
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 33,416,000	31,537,000	29,804,000	26,018,000	21,700,000	11,181,000
2015 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	18,535,000	18,641,000	18,974,000	19,021,000	19,047,000	20,223,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 5,000
Cumulative Number of Reported claims | claim	15,468
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 18,530,000	18,541,000	18,549,000	18,667,000	18,910,000	17,787,000
2015 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	9,201,000	9,201,000	9,201,000	9,908,000	12,555,000	12,965,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (77,000)
Cumulative Number of Reported claims | claim	288
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 7,022,000	6,445,000		4,267,000	3,319,000	428,000
2015 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	162,354,000	162,722,000	162,788,000	162,377,000	152,049,000	152,586,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 334,000
Cumulative Number of Reported claims | claim	20,075
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 161,850,000	161,773,000	161,745,000	160,572,000	145,337,000	$ 112,563,000
2016 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	177,009,000	180,486,000	185,009,000	192,318,000	192,912,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (2,481,000)
Cumulative Number of Reported claims | claim	49,380
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 171,865,000	167,458,000	154,964,000	137,917,000	78,862,000
2016 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	121,543,000	121,717,000	122,116,000	124,922,000	129,528,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (117,000)
Cumulative Number of Reported claims | claim	126,083
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 121,660,000	121,795,000	122,023,000	124,298,000	133,530,000
2016 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	40,679,000	40,916,000	40,947,000	39,416,000	37,954,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (718,000)
Cumulative Number of Reported claims	6,455
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 36,237,000	32,274,000	25,711,000	19,902,000	9,991,000
2016 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	17,725,000	17,808,000	17,909,000	18,506,000	20,216,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 16,000
Cumulative Number of Reported claims | claim	13,593
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 17,709,000	17,712,000	17,763,000	18,143,000	17,228,000
2016 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	9,491,000	9,847,000	10,594,000	10,594,000	10,594,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 53,000
Cumulative Number of Reported claims | claim	275
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 6,300,000	5,387,000	4,257,000	2,669,000	647,000
2016 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	60,019,000	61,262,000	64,208,000	66,442,000	67,116,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 393,000
Cumulative Number of Reported claims | claim	5,421
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 59,403,000	59,449,000	59,155,000	57,238,000	44,103,000
2017 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	177,941,000	182,068,000	184,429,000	185,673,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (4,569,000)
Cumulative Number of Reported claims | claim	46,237
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 164,467,000	153,675,000	133,037,000	77,519,000
2017 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	123,715,000	124,128,000	126,304,000	128,340,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (161,000)
Cumulative Number of Reported claims | claim	124,009
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 123,844,000	124,286,000	126,822,000	132,409,000
2017 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	39,369,000	41,055,000	41,373,000	42,865,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 575,000
Cumulative Number of Reported claims	6,129
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 28,721,000	24,409,000	20,106,000	10,407,000
2017 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	18,834,000	19,021,000	19,200,000	19,691,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 26,000
Cumulative Number of Reported claims | claim	13,113
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 18,787,000	18,915,000	19,336,000	17,957,000
2017 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	8,585,000	9,328,000	10,058,000	11,276,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 90,000
Cumulative Number of Reported claims | claim	267
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 3,593,000	2,913,000	1,676,000		$ 305,000
2017 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	68,737,000	70,689,000	76,560,000	80,736,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 1,202,000
Cumulative Number of Reported claims | claim	6,010
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 66,892,000	66,181,000	64,401,000	$ 46,366,000
2018 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	170,447,000	175,222,000	176,411,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (10,576,000)
Cumulative Number of Reported claims | claim	42,997
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 143,656,000	126,456,000	72,895,000
2018 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	128,426,000	130,145,000	129,450,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (312,000)
Cumulative Number of Reported claims | claim	119,716
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 128,624,000	132,591,000	138,036,000
2018 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	38,589,000	40,115,000	41,347,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 1,333,000
Cumulative Number of Reported claims	5,740
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 23,544,000	18,499,000	9,704,000
2018 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	19,270,000	19,937,000	21,230,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 35,000
Cumulative Number of Reported claims | claim	12,905
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 19,236,000	19,842,000	18,842,000
2018 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	9,951,000	9,951,000	9,951,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (1,733,000)
Cumulative Number of Reported claims | claim	250
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 3,972,000	2,039,000	551,000
2018 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	77,970,000	82,581,000	83,443,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 2,970,000
Cumulative Number of Reported claims | claim	8,236
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 72,078,000	70,959,000	$ 57,704,000
2019 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	174,439,000	176,171,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (8,860,000)
Cumulative Number of Reported claims | claim	40,287
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 127,910,000	72,219,000
2019 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	126,648,000	128,698,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (2,104,000)
Cumulative Number of Reported claims | claim	116,872
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 128,173,000	134,429,000
2019 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	49,163,000	51,679,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 2,099,000
Cumulative Number of Reported claims	5,635
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 22,480,000	12,113,000
2019 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	19,652,000	20,039,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 483,000
Cumulative Number of Reported claims | claim	12,736
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 19,161,000	18,128,000
2019 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	13,848,000	14,130,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 2,186,000
Cumulative Number of Reported claims | claim	246
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 3,343,000	1,634,000
2019 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	73,697,000	77,976,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (4,695,000)
Cumulative Number of Reported claims | claim	5,431
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 61,905,000	$ 49,121,000
2020 | Private Passenger Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	130,335,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 3,290,000
Cumulative Number of Reported claims | claim	24,467
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 52,962,000
2020 | Private Passenger Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	98,546,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (13,912,000)
Cumulative Number of Reported claims | claim	79,899
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 102,764,000
2020 | Commercial Automobile Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	35,010,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 13,235,000
Cumulative Number of Reported claims	3,011
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 7,025,000
2020 | Commercial Automobile Physical Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	16,507,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (127,000)
Cumulative Number of Reported claims | claim	9,052
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 15,550,000
2020 | Homeowners Liability
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	14,664,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ 6,531,000
Cumulative Number of Reported claims | claim	171
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 220,000
2020 | Homeowners Property Damage
incurred and paid claims development
Incurred claims and allocated claim adjustment expenses, net of reinsurance	80,093,000
Total of Incurred-but-Not-Reported Liabilities Plus Expected Development of Reported Claims	$ (3,791,000)
Cumulative Number of Reported claims | claim	5,865
Cumulative paid and allocated claim adjustment expenses, net of reinsurance	$ 50,304,000