Investments (Tables)

6 Months Ended

Jun. 30, 2012

Investments [Abstract]

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

June 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	$	47,877	$	4,205	$	—		$	52,082
States of the U.S. and political subdivisions of the states		27,658		5,573		(9	)		33,222
Corporate securities		296,573		35,028		(205	)		331,396
Mortgage-backed securities		245,172		13,536		(115	)		258,593
Commercial mortgage-backed securities		58,812		4,695		(14	)		63,493
Asset-backed securities		55,939		1,701		(78	)		57,562
Total fixed maturities	$	732,031	$	64,738	$	(421	)	$	796,348
Common stock	$	6,926	$	—	$	(220	)	$	6,706
Preferred stock	$	2,789	$	329	$	(12	)	$	3,106
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	$	31,105	$	31,429
Due after one year through five years		107,180		114,638
Due after five years through ten years		160,483		178,648
Due after ten years		73,340		91,985
Mortgage and asset-backed securities		359,923		379,648
Total	$	732,031	$	796,348

Gross unrealized losses of the Company's investment portfolio

	Less than 12 months					12 months or longer					Total
June 30, 2012	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		1,098		(9	)		—		—			1,098		(9	)
Corporate securities		2,916		(205	)		—		—			2,916		(205	)
Mortgage-backed securities		6,426		(115	)		—		—			6,426		(115	)
Commercial mortgage-backed securities		—		—			4,051		(14	)		4,051		(14	)
Asset-backed securities		4,492		(64	)		51		(14	)		4,543		(78	)
Subtotal, fixed maturity securities		14,932		(393	)		4,102		(28	)		19,034		(421	)
Common stock		6,706		(220	)		—		—			6,706		(220	)
Preferred stock		499		(1	)		516		(11	)		1,015		(12	)
Total temporarily impaired securities	$	22,137	$	(614	)	$	4,618	$	(39	)	$	26,755	$	(653	)

	Less than 12 months					12 months or longer					Total
December 31, 2011	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	)