Investments (Tables)

9 Months Ended

Sep. 30, 2012

Investments [Abstract]

Amortized cost and estimated fair values of the Company's investments

September 30, 2012	Amortized cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
Fixed maturity securities:
U.S. Treasury securities and other government corporations and agencies	$	49,624	$	3,912	$	—		$	53,536
States of the U.S. and political subdivisions of the states		41,204		6,106		(57	)		47,253
Corporate securities		288,141		38,320		(51	)		326,410
Mortgage-backed securities		214,995		14,079		(102	)		228,972
Commercial mortgage-backed securities		66,279		5,737		(98	)		71,918
Asset-backed securities		61,224		2,478		(30	)		63,672
Total fixed maturities	$	721,467	$	70,632	$	(338	)	$	791,761
Common stock	$	6,926	$	—	$	(220	)	$	6,706
Preferred stock	$	2,789	$	288	$	(12	)	$	3,065
December 31, 2011	Amortized cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
Fixed maturity securities:
U.S. Treasury securities and other government corporations and agencies	$	58,814	$	4,315	$	(39	)	$	63,090
States of the U.S. and political subdivisions of the states		27,676		4,581		—			32,257
Corporate securities		298,452		29,601		(1,127	)		326,926
Mortgage-backed securities		257,864		12,973		(26	)		270,811
Commercial mortgage-backed securities		60,198		3,941		(178	)		63,961
Asset-backed securities		58,437		666		(149	)		58,954
Total fixed maturities	$	761,441	$	56,077	$	(1,519	)	$	815,999
Common stock	$	6,926	$	—	$	(175	)	$	6,751
Preferred stock	$	2,789	$	212	$	(69	)	$	2,932

Amortized cost and estimated fair value of fixed maturity securities by contractual maturity

	Amortized cost		Estimated fair value
	(dollars in thousands)
Due in one year or less	$	42,252	$	43,073
Due after one year through five years		80,828		87,916
Due after five years through ten years		178,448		198,782
Due after ten years		77,441		97,428
Mortgage and asset-backed securities		342,498		364,562
Total	$	721,467	$	791,761

Gross unrealized losses of the Company's investment portfolio

September 30, 2012	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(dollars in thousands)
Fixed maturity securities:
U.S. Treasury securities and other government corporations and agencies	$	—	$	—		$	—	$	—		$	—	$	—
States of the U.S. and political subdivisions of the states		6,555		(57	)		—		—			6,555		(57	)
Corporate securities		4,476		(51	)		—		—			4,476		(51	)
Mortgage-backed securities		5,071		(102	)		—		—			5,071		(102	)
Commercial mortgage-backed securities		5,540		(98	)		—		—			5,540		(98	)
Asset-backed securities		2,419		(19	)		56		(11	)		2,475		(30	)
Subtotal, fixed maturity securities		24,061		(327	)		56		(11	)		24,117		(338	)
Common stock		6,926		(220	)		—		—			6,926		(220	)
Preferred stock		—		—			515		(12	)		515		(12	)
Total temporarily impaired securities	$	30,987	$	(547	)	$	571	$	(23	)	$	31,558	$	(570	)

December 31, 2011	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(dollars in thousands)
Fixed maturity securities:
U.S. Treasury securities and other government corporations and agencies	$	3,749	$	(39	)	$	—	$	—		$	3,749	$	(39	)
States of the U.S. and political subdivisions of the states		—		—			—		—			—		—
Corporate securities		31,808		(1,127	)		—		—			31,808		(1,127	)
Mortgage-backed securities		6,574		(26	)		—		—			6,574		(26	)
Commercial mortgage-backed securities		13,401		(135	)		5,432		(43	)		18,833		(178	)
Asset-backed securities		15,537		(149	)		—		—			15,537		(149	)
Subtotal, fixed maturity securities		71,069		(1,476	)		5,432		(43	)		76,501		(1,519	)
Common stock		6,751		(175	)		—		—			6,751		(175	)
Preferred stock		1,436		(50	)		509		(19	)		1,945		(69	)
Total temporarily impaired securities	$	79,256	$	(1,701	)	$	5,941	$	(62	)	$	85,197	$	(1,763	)