Consolidated Statements of Comprehensive Earnings (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements of Comprehensive Earnings [Abstract]
Net earnings	$ 6,078	$ 5,728	$ 12,464	$ 18,204
Other comprehensive income before income taxes:
Unrealized gains on securities available-for-sale	11,591	12,725	21,641	18,801
Amortization of gain on hedging transactions		(20)	(41)	(59)
Reclassification adjustment for realized (gains) included in net earnings	(5,693)	(10)	(5,732)	(11,311)
Total other comprehensive income before income taxes	5,898	12,695	15,868	7,431
Income tax expense related to items of other comprehensive income	228	2,776	1,820	3,622
Other comprehensive income net of income taxes	5,670	9,919	14,048	3,809
Comprehensive income	11,748	15,647	26,512	22,013
Less: Comprehensive income (loss) attributable to the non-controlling interest	(76)	159	(42)	696
Comprehensive income attributable to American Safety Insurance Holdings, Ltd.	$ 11,824	$ 15,488	$ 26,554	$ 21,317

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