Investments (Tables)

12 Months Ended

Dec. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

The amortized cost and estimated fair value of investments in debt and equity securities by category is as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
As of December 31, 2012	Cost		Gains		Losses			Value
U.S. Treasury securities and obligations of U.S. Government	$	40,050	$	14	$	(3	)	$	40,061
Corporate bonds		79,516		2,794		(763	)		81,547
Collateralized corporate bank loans		106,093		1,021		(743	)		106,371
Municipal bonds		162,479		4,023		(2,770	)		163,732
Mortgage-backed		9,662		97		(35	)		9,724
Total debt securities		397,800		7,949		(4,314	)		401,435
Financial services		11,008		3,880		(1	)		14,887
All other		20,494		9,058		(514	)		29,038
Total equity securities		31,502		12,938		(515	)		43,925
Total debt and equity securities	$	429,302	$	20,887	$	(4,829	)	$	445,360
As of December 31, 2011
U.S. Treasury securities and obligations of U.S. Government	$	11,152	$	24	$	-		$	11,176
Corporate bonds		93,272		2,305		(1,655	)		93,922
Collateralized corporate bank loans		94,638		175		(1,920	)		92,893
Municipal bonds		177,432		3,458		(2,549	)		178,341
Mortgage-backed		4,084		80		(27	)		4,137
Total debt securities		380,578		6,042		(6,151	)		380,469
Financial services		11,618		4,463		(260	)		15,821
All other		18,847		9,554		(63	)		28,338
Total equity securities		30,465		14,017		(323	)		44,159
Total debt and equity securities	$	411,043	$	20,059	$	(6,474	)	$	424,628

Investment Income [Table Text Block]

Major categories of net investment income are summarized as follows (in thousands):

	Twelve Months Ended
	December 31
	2012			2011			2010
U.S. Treasury securities and obligations of U.S. Government	$	53		$	115		$	71
Corporate bonds		4,218			3,851			3,905
Collateralized corporate bank loans		5,261			5,284			4,149
Municipal bonds		5,616			6,632			6,259
Mortgage backed		106			86			35
Equity securities-financial services		70			89			335
Equity securities-all other		464			395			501
Cash and cash equivalents		246			163			195
		16,034			16,615			15,450
Investment expenses		(741	)		(735	)		(601	)
Investment income, net of expenses	$	15,293		$	15,880		$	14,849

Realized Gain (Loss) on Investments [Table Text Block]

Major categories of net realized gains on investments are summarized as follows (in thousands):

	Twelve Months Ended
	December 31
	2012			2011			2010
U.S. Treasury securities and obligations of U.S. Government	$	-		$	35		$	-
Corporate bonds		13			300			2,026
Collateralized corporate bank loans		391			699			2,170
Municipal bonds		(441	)		(500	)		(86	)
Equity securities-financial services		84			2,029			2,858
Equity securities-all other		2,142			1,070			1,434
Net realized gain		2,189			3,633			8,402
Other-than-temporary impairments		(246	)		-			-
Gain on investments	$	1,943		$	3,633		$	8,402

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

The following schedules summarize the gross unrealized losses showing the length of time that investments have been continuously in an unrealized loss position as of December 31, 2012 and December 31, 2011 (in thousands):

	As of December 31, 2012
	12 months or less					Longer than 12 months					Total
			Unrealized					Unrealized					Unrealized
	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
U.S. Treasury securities and
obligations of U.S. Government	$	23,998	$	(3	)	$	-	$	-		$	23,998	$	(3	)
Corporate bonds		10,802		(38	)		6,910		(725	)		17,712		(763	)
Collateralized corporate bank loans		6,273		(97	)		14,236		(646	)		20,509		(743	)
Municipal bonds		30,073		(362	)		28,809		(2,408	)		58,882		(2,770	)
Mortgage-backed		7,367		(32	)		84		(3	)		7,451		(35	)
Total debt securities		78,513		(532	)		50,039		(3,782	)		128,552		(4,314	)
Financial services		92		(1	)		-		-			92		(1	)
All other		3,271		(514	)		-		-			3,271		(514	)
Total equity securities		3,363		(515	)		-		-			3,363		(515	)
Total debt and equity securities	$	81,876	$	(1,047	)	$	50,039	$	(3,782	)	$	131,915	$	(4,829	)

	As of December 31, 2011
	12 months or less					Longer than 12 months					Total
			Unrealized					Unrealized					Unrealized
	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
Corporate bonds	$	21,752	$	(869	)	$	2,366	$	(786	)	$	24,118	$	(1,655	)
Collateralized corporate bank loans		69,717		(1,917	)		19		(3	)		69,736		(1,920	)
Municipal bonds		26,780		(196	)		39,741		(2,353	)		66,521		(2,549	)
Mortgage-backed		740		(27	)		-		-			740		(27	)
Total debt securities		118,989		(3,009	)		42,126		(3,142	)		161,115		(6,151	)
Financial services		1,789		(260	)		-		-			1,789		(260	)
All other		2,959		(63	)		-		-			2,959		(63	)
Total equity securities		4,748		(323	)		-		-			4,748		(323	)
Total debt and equity securities	$	123,737	$	(3,332	)	$	42,126	$	(3,142	)	$	165,863	$	(6,474	)

Schedule of Amortized Cost and Estimated Fair Value of Available-for-sale Securities Contractual Maturities [Table Text Block]

The amortized cost and estimated fair value of debt securities at December 31, 2012 by contractual maturity are as follows. Expected maturities may differ from contractual maturities because certain borrowers may have the right to call or prepay obligations with or without penalties.

	Amortized		Fair
	Cost		Value
	(in thousands)
Due in one year or less	$	67,748	$	68,739
Due after one year through five years		167,458		169,811
Due after five years through ten years		101,673		102,770
Due after ten years		51,259		50,391
Mortgage-backed		9,662		9,724
	$	397,800	$	401,435