Investments in Debt and Equity Securities (Tables)

9 Months Ended

Sep. 30, 2016

Investments in Debt and Equity Securities

Summary of activities for available-for-sale securities

		Gross Unrealized
		(dollars in thousands)
September 30, 2016		Cost		Gains		Losses			Fair Value
Equity	$	235,579	$	48,658	$	(6,159	)	$	278,078
Debt		195,849		4,529		(947	)		199,431
Other		8,398		—		(1	)		8,397
Total	$	439,826	$	53,187	$	(7,107	)	$	485,906

		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