Investments in Debt and Equity Securities (Tables)

3 Months Ended

Mar. 31, 2016

Investments in Debt and Equity Securities

Summary of activities for available-for-sale securities

		Gross Unrealized
		(dollars in thousands)
March 31, 2016		Cost		Gains		Losses			Fair Value
Equity	$	231,117	$	39,324	$	(9,263	)	$	261,178
Debt		193,012		3,174		(1,887	)		194,299
Other		4,435		—		(1	)		4,434
Total	$	428,564	$	42,498	$	(11,151	)	$	459,911

		Gross Unrealized
		(dollars in thousands)
December 31, 2015		Cost		Gains		Losses			Fair Value
Equity	$	230,123	$	37,494	$	(9,635	)	$	257,982
Debt		189,700		1,158		(3,491	)		187,367
Other		5,255		—		(4	)		5,251
Total	$	425,078	$	38,652	$	(13,130	)	$	450,600