Investments in Debt and Equity Securities (Tables)

6 Months Ended

Jun. 30, 2012

Investments in Debt and Equity Securities

Summary of activities for available-for-sale securities

	Gross Unrealized
		(dollars in thousands)
June 30, 2012	Cost		Gains		Losses			Fair Value
Equity	$	149,018	$	37,560	$	(6,900	)	$	179,678
Debt		162,427		9,025		(3,823	)		167,629
Other		11,923		—		—			11,923
Total	$	323,368	$	46,585	$	(10,723	)	$	359,230

	Gross Unrealized
		(dollars in thousands)
December 31, 2011		Cost		Gains		Losses			Fair Value
Equity	$	149,263	$	29,789	$	(9,996	)	$	169,056
Debt		160,218		18,021		(11,063	)		167,176
Other		15,646		1,035		(1,541	)		15,140
Total	$	325,127	$	48,845	$	(22,600	)	$	351,372