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SCHEDULE IV - SUPPLEMENTARY REINSURANCE INFORMATION (DETAILS) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Supplementary Insurance Information [Line Items] |  |  |
DIRECT GROSS PREMIUM | $ 2,112,178 | $ 2,031,565 | $ 2,009,974
CEDED TO OTHER COMPANIES | 1,217,234 | 929,064 | 804,544
ASSUMED FROM OTHER COMPANIES | 2,858,030 | 2,572,165 | 2,701,545
NET AMOUNT | $ 3,752,974 | $ 3,674,666 | $ 3,906,975
PERCENTAGE OF AMOUNT ASSUMED TO NET | 76.20% | 70.00% | 69.10%
Property and Casualty [Member] |  |  |
Supplementary Insurance Information [Line Items] |  |  |
DIRECT GROSS PREMIUM | $ 1,975,497 | $ 1,901,757 | $ 1,882,695
CEDED TO OTHER COMPANIES | 1,215,775 | 910,917 | 786,555
ASSUMED FROM OTHER COMPANIES | 2,564,606 | 2,350,680 | 2,548,174
NET AMOUNT | $ 3,324,328 | $ 3,341,520 | $ 3,644,314
PERCENTAGE OF AMOUNT ASSUMED TO NET | 77.10% | 70.30% | 69.90%
Accident and Health [Member] |  |  |
Supplementary Insurance Information [Line Items] |  |  |
DIRECT GROSS PREMIUM | $ 136,681 | $ 129,808 | $ 127,279
CEDED TO OTHER COMPANIES | 1,459 | 18,147 | 17,989
ASSUMED FROM OTHER COMPANIES | 293,424 | 221,485 | 153,371
NET AMOUNT | $ 428,646 | $ 333,146 | $ 262,661
PERCENTAGE OF AMOUNT ASSUMED TO NET | 68.50% | 66.50% | 58.40%

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- Definition Amount of written premiums assumed from other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(2),(c)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Amount of written premiums ceded to other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Amount of actual written premiums, including, as applicable, premiums from reinsurance assumed and net of premiums on reinsurance ceded. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915 + Details
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