Investments (Tables)

3 Months Ended

Mar. 31, 2016

Investment in Marketable Securities [Abstract]

Investments

	At March 31, 2016
In thousands	Cost	Gross Unrealized Losses		Gross Unrealized Gains	Estimated Fair Value
Equity securities	3,509	(108	)	2,129	5,530

	At December 31, 2015
In thousands	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Estimated Fair Value
Equity securities	$	3,386	$	(1,179	)	$	559	$	2,766

Gross unrealized losses on investment securities

The following table summarizes the gross unrealized losses on equity securities for which other-than-temporary impairments have not been recognized and the fair values of those securities, aggregated by the length of time the individual securities have been in a continuous unrealized loss position, at March 31, 2016:

	Less than twelve months					Twelve months or more				Total
In thousands	Unrealized Losses			Fair Value		Unrealized Losses		Fair Value		Unrealized Losses			Fair Value
Equity securities	$	(108	)	$	103	$	—	$	—	$	(108	)	$	103