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v3.3.1.900

Related Party Transactions and Major Customers (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) customer | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written | $ 336,093 | $ 369,642 | $ 661,997 | $ 643,578 | $ 132,780 | $ 200,992 | $ 511,540 | $ 705,260 | $ 2,011,310 | $ 1,550,572 | $ 1,605,412
Gross premiums earned |  |  |  |  |  |  |  |  | 1,769,088 | 1,450,047 | 1,482,511
Acquisition expenses | 55,399 | $ 78,126 | $ 61,666 | $ 43,401 | 39,749 | $ 37,550 | $ 33,477 | $ 33,700 | 238,592 | 144,476 | 125,501
Net reinsurance costs and recoveries |  |  |  |  |  |  |  |  | (96,734) | (30,634) | (13,852)
Reserve for claims and claim expenses | 2,767,045 |  |  |  | 1,412,510 |  |  |  | 2,767,045 | 1,412,510 | 1,563,730
Distributions received |  |  |  |  |  |  |  |  | $ 13,300 | $ 10,300 | $ 9,900
Gross premiums written |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of significant customers | customer |  |  |  |  |  |  |  |  | 3 |  |
Percent of gross premiums received |  |  |  |  |  |  |  |  | 81.50% | 87.20% | 85.30%
Gross premiums written | AON |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent of gross premiums received |  |  |  |  |  |  |  |  | 48.10% | 51.50% | 45.30%
Gross premiums written | Marsh |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent of gross premiums received |  |  |  |  |  |  |  |  | 21.70% | 21.50% | 22.90%
Gross premiums written | Willis Towers Watson |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent of gross premiums received |  |  |  |  |  |  |  |  | 11.70% | 14.20% | 17.10%
Tower Hill Companies |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | $ 32,200 | $ 40,000 | $ 46,700
Gross premiums earned |  |  |  |  |  |  |  |  | 35,800 | 41,900 | 44,900
Acquisition expenses |  |  |  |  |  |  |  |  | 4,100 | 4,700 | 5,300
Related party receivables | 14,300 |  |  |  | 18,300 |  |  |  | 14,300 | 18,300 |
Net reinsurance costs and recoveries |  |  |  |  |  |  |  |  | 1,600 | 3,600 | 4,100
Reserve for claims and claim expenses | $ 38,200 |  |  |  | $ 40,300 |  |  |  | 38,200 | 40,300 |
Distributions received |  |  |  |  |  |  |  |  | $ 13,100 | 10,000 |
Angus Partners LLC |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership % | 40.40% |  |  |  |  |  |  |  | 40.40% |  |
Related party income |  |  |  |  |  |  |  |  | $ 0 | 0 | 5,000
Top Layer Reinsurance Ltd. |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Distributions received |  |  |  |  |  |  |  |  | 0 | 0 | 0
Management fees revenue |  |  |  |  |  |  |  |  | $ 2,600 | $ 2,800 | $ 3,800

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