XML 152 R125.htm IDEA: XBRL DOCUMENT v3.8.0.1
Schedule III - Supplementary Insurance Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred policy acquisition costs $ 235,055       $ 222,564       $ 235,055 $ 222,564 $ 213,159
Reserve for loss and loss expenses 3,771,240       3,691,719       3,771,240 3,691,719 3,517,728
Unearned premiums 1,349,644       1,262,819       1,349,644 1,262,819 1,169,710
Net premiums earned                 2,291,027 2,149,572 1,989,909
Net investment income                 168,241 125,817 134,487
Loss and loss expense incurred                 1,345,074 1,234,797 1,148,541
Amortization of deferred policy acquisition costs                 469,236 450,328 399,436
Other operating expenses                 322,381 312,514 292,903
Net premiums written                 2,370,641 2,237,288 2,069,904
Other insurance expenses                 333,097 321,395 300,359
Other income (2,190) $ (1,994) $ (3,291) $ (3,241) (1,863) $ (2,199) $ (3,868) $ (951) (10,716) (8,881) (7,456)
Standard Commercial Lines [Member]                      
Deferred policy acquisition costs 193,408       181,193       193,408 181,193 171,476
Reserve for loss and loss expenses 3,165,217       3,098,554       3,165,217 3,098,554 2,998,749
Unearned premiums 956,173       884,976       956,173 884,976 803,648
Net premiums earned                 1,788,499 1,665,483 1,529,442
Net investment income                 0 0 0
Loss and loss expense incurred                 1,008,150 913,506 819,573
Amortization of deferred policy acquisition costs                 387,552 367,813 323,754
Other operating expenses                 243,283 237,729 221,619
Net premiums written                 1,858,735 1,745,782 1,596,965
Standard Personal Lines [Member]                      
Deferred policy acquisition costs 16,952       16,664       16,952 16,664 17,258
Reserve for loss and loss expenses 263,166       286,081       263,166 286,081 265,054
Unearned premiums 295,435       282,111       295,435 282,111 276,533
Net premiums earned                 289,701 280,607 288,134
Net investment income                 0 0 0
Loss and loss expense incurred                 189,294 177,749 200,237
Amortization of deferred policy acquisition costs                 32,542 34,105 33,638
Other operating expenses                 56,761 56,334 52,923
Net premiums written                 296,775 281,822 283,926
Excess And Surplus Operations [Member]                      
Deferred policy acquisition costs 24,695       24,707       24,695 24,707 24,425
Reserve for loss and loss expenses 342,857       307,084       342,857 307,084 253,925
Unearned premiums 98,036       95,732       98,036 95,732 89,529
Net premiums earned                 212,827 203,482 172,333
Net investment income                 0 0 0
Loss and loss expense incurred                 147,630 143,542 128,731
Amortization of deferred policy acquisition costs                 49,142 48,410 42,044
Other operating expenses                 22,337 18,451 18,361
Net premiums written                 215,131 209,684 189,013
Investments Segment [Member]                      
Deferred policy acquisition costs 0       0       0 0 0
Reserve for loss and loss expenses 0       0       0 0 0
Unearned premiums $ 0       $ 0       0 0 0
Net premiums earned                 0 0 0
Net investment income                 168,241 125,817 134,487
Loss and loss expense incurred                 0 0 0
Amortization of deferred policy acquisition costs                 0 0 0
Other operating expenses                 0 0 0
Net premiums written                 0 0 0
Miscellaneous Income [Member]                      
Other income                 $ (10,716) $ (8,881) $ (7,456)