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Reinsurance (Effect Of Reinsurance And Retrocessional Activity On Premiums Written And Earned And On Net Claims And Claim Expenses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Premiums written |  |  |  |
Direct | $ 67,805 | $ 57,541 | $ 141,213 | $ 100,717
Assumed | 759,610 | 701,587 | 1,608,292 | 1,520,544
Ceded | (271,670) | (239,212) | (649,624) | (589,670)
Net premiums written | 555,745 | 519,916 | 1,099,881 | 1,031,591
Premiums earned |  |  |  |
Direct | 56,357 | 37,936 | 114,525 | 71,076
Assumed | 520,347 | 464,540 | 1,019,346 | 921,181
Ceded | (194,439) | (151,074) | (385,561) | (287,249)
Net premiums earned | 382,265 | 351,402 | 748,310 | 705,008
Claims and claim expenses |  |  |  |
Gross claims and claim expenses incurred | 189,903 | 224,852 | 441,707 | 386,850
Claims and claim expenses recovered | (47,316) | (57,102) | (106,039) | (92,495)
Net claims and claim expenses incurred | $ 142,587 | $ 167,750 | $ 335,668 | $ 294,355

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- Definition Amount of earned premiums ceded to other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.1) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 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),(c)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167274&loc=d3e27175-158546 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 + Details
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