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Reinsurance - Impact of the Reinsurance Treaties on Premiums Written and Earned (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Premiums Written: |  |  |  |
Direct | $ 93,282 | $ 105,787 | $ 308,682 | $ 343,927
Assumed | (18) | (416) | (377) | (1,792)
Gross written | 93,264 | 105,371 | 308,305 | 342,135
Ceded | (29,242) | (41,077) | (105,998) | (100,294)
Net premiums written | 64,022 | 64,294 | 202,307 | 241,841
Premiums Earned: |  |  |  |
Direct | 92,112 | 93,012 | 283,011 | 263,814
Assumed | 430 | 10,830 | 3,262 | 57,360
Gross earned | 92,542 | 103,842 | 286,273 | 321,174
Ceded | (29,242) | (41,077) | (105,998) | (100,294)
Net premiums earned | $ 63,300 | $ 62,765 | $ 180,275 | $ 220,880

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