Investments in Debt and Equity Securities (Tables)

6 Months Ended

Jun. 30, 2013

Investments in Debt and Equity Securities

Summary of activities for available-for-sale securities

	Gross Unrealized
		(dollars in thousands)
June 30, 2013		Cost		Gains		Losses			Fair Value
Equity	$	172,916	$	45,712	$	(4,608	)	$	214,020
Debt		164,014		6,919		(9,164	)		161,769
Other		13,439		—		(4	)		13,435
Total	$	350,369	$	52,631	$	(13,776	)	$	389,224

	Gross Unrealized
		(dollars in thousands)
December 31, 2012		Cost		Gains		Losses			Fair Value
Equity	$	153,846	$	45,071	$	(3,675	)	$	195,242
Debt		163,127		10,286		(4,501	)		168,912
Other		13,654		—		—			13,654
Total	$	330,627	$	55,357	$	(8,176	)	$	377,808