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Property and Casualty Unpaid Claims and Claim Expenses (Details 2) | Dec. 31, 2016 USD ($) Number | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2009 USD ($) | Dec. 31, 2008 USD ($) | Dec. 31, 2007 USD ($)
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Homeowners [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | $ 1,165,428,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 1,133,132,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 18,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item | 23,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 32,314,000 |  |  |  |  |  |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2007 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 83,111,000 | $ 83,101,000 | $ 83,090,000 | $ 83,241,000 | $ 83,266,000 | $ 83,198,000 | $ 85,605,000 | $ 84,666,000 | $ 85,725,000 | $ 85,552,000
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 19,298 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 83,096,000 | 83,096,000 | 83,028,000 | 83,028,000 | 82,977,000 | 82,722,000 | 82,862,000 | 82,272,000 | 79,566,000 | 59,268,000
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2008 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 139,306,000 | 139,348,000 | 139,472,000 | 139,511,000 | 139,232,000 | 139,743,000 | 136,002,000 | 136,743,000 | 140,469,000 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 31,376 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 139,256,000 | 139,224,000 | 139,121,000 | 138,992,000 | 138,802,000 | 136,923,000 | 134,235,000 | 130,888,000 | 105,401,000 |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2009 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 112,900,000 | 113,216,000 | 113,230,000 | 113,357,000 | 113,096,000 | 112,970,000 | 112,280,000 | 113,274,000 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 22,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 20,320 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 112,848,000 | 112,827,000 | 112,720,000 | 112,554,000 | 110,324,000 | 108,217,000 | 104,407,000 | 81,570,000 |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2010 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 132,859,000 | 133,136,000 | 133,216,000 | 133,235,000 | 133,358,000 | 136,907,000 | 140,994,000 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 235,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 23,624 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 132,599,000 | 132,604,000 | 132,523,000 | 132,246 | 129,790,000 | 124,326,000 | 98,190,000 |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2011 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 148,414,000 | 148,755,000 | 148,860,000 | 150,791,000 | 150,334,000 | 150,141,000 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 358,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 27,676 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 148,026,000 | 147,451,000 | 146,908,000 | 145,852,000 | 142,846,000 | 123,046,000 |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2012 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 106,309,000 | 106,486,000 | 109,360,000 | 109,156,000 | 108,754,000 |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 502,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 20,239 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 105,561,000 | 105,156,000 | 104,203,000 | 101,566,000 | 84,260,000 |  |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2013 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 102,406,000 | 103,982,000 | 107,489,000 | 105,584,000 |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 1,023,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 18,066 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 100,968,000 | 99,361,000 | 96,599,000 | 76,890,000 |  |  |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2014 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 109,058,000 | 113,506,000 | 111,647,000 |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 3,136,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 18,400 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 105,703,000 | 103,030,000 | 83,314,000 |  |  |  |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2015 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 115,134,000 | 111,706,000 |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 4,480,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 17,054 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 109,303,000 | 90,704,000 |  |  |  |  |  |  |  |
Homeowners [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 115,931,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 11,737,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 15,578 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 95,772,000 |  |  |  |  |  |  |  |  |
Auto Liability [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 1,524,935,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 1,342,855,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 80,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item | 451,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 182,162,000 |  |  |  |  |  |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2007 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 136,826,000 | 136,745,000 | 136,855,000 | 136,817,000 | 137,151,000 | 138,148,000 | 139,619,000 | 144,661,000 | 146,400,000 | 148,884,000
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 49,856 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 136,815,000 | 136,630,000 | 136,504,000 | 136,056,000 | 135,467,000 | 134,207,000 | 130,555,000 | 122,129,000 | 101,803,000 | 56,819,000
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2008 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 138,975,000 | 139,131,000 | 139,938,000 | 140,648,000 | 141,666,000 | 149,225,000 | 142,279,000 | 145,669,000 | 144,694,000 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 2,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 47,932 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 138,962,000 | 138,875,000 | 138,758,000 | 138,539,000 | 137,980,000 | 134,377,000 | 123,062,000 | 103,370,000 | 54,750,000 |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2009 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 149,822,000 | 150,568,000 | 150,919,000 | 151,418,000 | 157,941,000 | 153,662,000 | 158,703,000 | 159,934,000 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 48,780 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 149,801,000 | 149,608,000 | 148,783,000 | 146,383,000 | 142,524,000 | 133,568,000 | 110,921,000 | 60,011,000 |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2010 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 149,818,000 | 151,653,000 | 152,483,000 | 154,222,000 | 156,369,000 | 160,058,000 | 157,712,000 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 324,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 49,310 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 149,247,000 | 148,751,000 | 147,337,000 | 144,255,000 | 137,012,000 | 118,345,000 | 63,416,000 |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2011 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 139,840,000 | 142,488,000 | 143,133,000 | 145,735,000 | 146,713,000 | 150,803,000 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 1,164,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 46,171 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 138,151,000 | 136,906,000 | 133,931,000 | 126,812,000 | 108,837,000 | 61,070,000 |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2012 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 147,594,000 | 149,347,000 | 150,336,000 | 153,815,000 | 156,448,000 |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 2,849 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 45,615 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 142,916,000 | 138,641,000 | 127,185,000 | 109,574,000 | 61,279,000 |  |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2013 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 150,657,000 | 150,720,000 | 152,858,000 | 153,860,000 |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 6,501,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 46,195 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 139,954,000 | 131,215,000 | 108,856,000 | 62,224,000 |  |  |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2014 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 158,470,000 | 157,249,000 | 155,105,000 |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 8,493,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 47,146 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 139,463,000 | 117,468,000 | 61,329,000 |  |  |  |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2015 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 172,553,000 | 165,515,000 |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 13,074,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 47,529 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 134,473,000 | 70,834,000 |  |  |  |  |  |  |  |
Auto Liability [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 180,380,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 55,506,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 41,220 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 73,073,000 |  |  |  |  |  |  |  |  |
Auto Physical Damage [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 902,576,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 896,202,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item | 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 6,374,000 |  |  |  |  |  |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2007 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 86,680,000 | 86,683,000 | 86,694,000 | 86,706,000 | 86,713,000 | 86,695,000 | 85,515,000 | 86,178,000 | 86,178,000 | 87,051,000
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 70,280 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 86,680,000 | 86,685,000 | 86,694,000 | 86,706,000 | 86,713,000 | 86,695,000 | 86,637,000 | 86,678,000 | 86,439,000 | $ 81,171,000
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2008 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 87,954,000 | 87,966,000 | 87,976,000 | 87,979,000 | 87,992,000 | 86,900,000 | 87,834,000 | 87,854,000 | 89,088,000 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 72,117 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 87,954,000 | 87,966,000 | 87,976,000 | 87,979,000 | 87,992,000 | 87,949,000 | 87,905,000 | 87,963,000 | $ 82,412,000 |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2009 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 81,963,000 | 81,972,000 | 81,986,000 | 82,000,000 | 82,635,000 | 83,202,000 | 83,515,000 | 84,539,000 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 72,867 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 81,963,000 | 81,973,000 | 81,985,000 | 82,000,000 | 82,015,000 | 82,039,000 | 82,117,000 | $ 78,456,000 |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2010 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 83,036,000 | 83,050,000 | 83,052,000 | 83,046,000 | 83,103,000 | 83,420,000 | 84,112,000 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 77,343 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 83,036,000 | 83,051,000 | 83,067,000 | 83,087,000 | 83,103,000 | 83,120,000 | $ 79,329,000 |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2011 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 85,116,000 | 85,143,000 | 85,120,000 | 86,023,000 | 85,507,000 | 86,205,000 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 76,113 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 85,116,000 | 85,127,000 | 85,148,000 | 85,181,000 | 85,254,000 | $ 83,227,000 |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2012 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 83,354,000 | 83,431,000 | 83,402,000 | 82,337,000 | 83,770,000 |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 7,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 72,803 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 83,347,000 | 83,355,000 | 83,372,000 | 83,418,000 | $ 80,519,000 |  |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2013 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 88,627,000 | 88,672,000 | 88,856,000 | 91,448,000 |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 95,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 75,845 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 88,532,000 | 88,580,000 | 88,688,000 | $ 85,110,000 |  |  |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2014 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 95,422,000 | 95,634,000 | 95,572,000 |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 151,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 82,467 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 95,266,000 | 95,444,000 | $ 88,939,000 |  |  |  |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2015 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 97,994,000 | 99,291,000 |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 139,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 82,335 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 97,850,000 | $ 92,138,000 |  |  |  |  |  |  |  |
Auto Physical Damage [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member] |  |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 112,430,000 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (944,000) |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | Number | 77,495 |  |  |  |  |  |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 106,458,000 |  |  |  |  |  |  |  |  |

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