v3.3.1.900
Schedule III Supplementary Insurance Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Supplementary Insurance Information, by Segment [Line Items]      
Deferred commission and other acquisition expenses $ 397,548 $ 372,487 $ 304,908
Reserve for loss and loss adjustment expenses 2,510,101 2,271,292 1,957,835
Unearned premiums 1,354,572 1,207,757 1,034,754
Net premiums earned 2,429,069 2,251,743 2,000,887
Net investment income 131,092 117,215 91,352
Net loss and loss adjustment expenses 1,633,570 1,498,271 1,349,630
Amortization of deferred commission and other acquisition expenses 724,197 659,315 556,578
General and admin. expenses 64,872 62,558 58,353
Net premiums written 2,514,116 2,458,136 2,096,301
Diversified Reinsurance segment      
Supplementary Insurance Information, by Segment [Line Items]      
Deferred commission and other acquisition expenses 80,012 87,289 88,721
Reserve for loss and loss adjustment expenses 1,046,471 1,058,924 1,010,195
Unearned premiums 277,460 293,893 321,659
Net premiums earned 744,875 854,026 753,157
Net investment income 0 0 0
Net loss and loss adjustment expenses 547,296 579,771 519,962
Amortization of deferred commission and other acquisition expenses 196,292 233,711 190,604
General and admin. expenses 37,550 38,858 37,649
Net premiums written 734,781 850,049 763,374
AmTrust Reinsurance segment      
Supplementary Insurance Information, by Segment [Line Items]      
Deferred commission and other acquisition expenses 317,536 285,232 209,439
Reserve for loss and loss adjustment expenses 1,420,418 1,122,479 803,597
Unearned premiums 1,077,112 913,861 687,357
Net premiums earned 1,684,191 1,378,327 988,900
Net investment income 0 0 0
Net loss and loss adjustment expenses 1,074,072 893,502 653,528
Amortization of deferred commission and other acquisition expenses 527,863 418,908 291,559
General and admin. expenses 2,947 2,533 1,566
Net premiums written 1,779,334 1,610,485 1,169,961
Total reportable segments      
Supplementary Insurance Information, by Segment [Line Items]      
Deferred commission and other acquisition expenses 397,548 372,521 298,160
Reserve for loss and loss adjustment expenses 2,466,889 2,181,403 1,813,792
Unearned premiums 1,354,572 1,207,754 1,009,016
Net premiums earned 2,429,066 2,232,353 1,742,057
Net investment income 0 0 0
Net loss and loss adjustment expenses 1,621,368 1,473,273 1,173,490
Amortization of deferred commission and other acquisition expenses 724,155 652,619 482,163
General and admin. expenses 40,497 41,391 39,215
Net premiums written 2,514,115 2,460,534 1,933,335
Other      
Supplementary Insurance Information, by Segment [Line Items]      
Deferred commission and other acquisition expenses 0 (34) 6,748
Reserve for loss and loss adjustment expenses 43,212 89,889 144,043
Unearned premiums 0 3 25,738
Net premiums earned 3 19,390 258,830
Net investment income 131,092 117,215 91,352
Net loss and loss adjustment expenses 12,202 24,998 176,140
Amortization of deferred commission and other acquisition expenses 42 6,696 74,415
General and admin. expenses 24,375 21,167 19,138
Net premiums written $ 1 $ (2,398) $ 162,966