Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investment in Marketable Securities [Abstract]

Investments

	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

	At December 31, 2014
In thousands	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Estimated Fair Value
Equity securities	$	5,687	$	(8	)	$	303	$	5,982

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 December 31, 2015:

	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	$	(1,179	)	$	614	$	—	$	—	$	(1,179	)	$	614