Investments in Available-for-Sale Securities (Tables)

12 Months Ended

Dec. 31, 2014

Available-for-sale Securities [Abstract]

Available-for-sale Securities

The Company's investments in available-for-sale marketable securities are as follows:

	December 31, 2014
										Balance Sheet
			Gross		Gross					Classification
			Unrealized		Unrealized			Fair		Short-Term		Other
	Cost Basis		Gains		Losses			Value		Investments		Assets
	(In thousands)
Available-for-sale:
Corporate notes and bonds	$	253,590	$	—	$	(4,636	)	$	248,954	$	248,954	$	—
Equity securities	3,910		4,125		(2,890		)	5,145		—		5,145
Total Investments	$	257,500	$	4,125	$	(7,526	)	$	254,099	$	248,954	$	5,145

	December 31, 2013
										Balance Sheet
			Gross		Gross					Classification
			Unrealized		Unrealized			Fair		Short-Term		Other
	Cost Basis		Gains		Losses			Value		Investments		Assets
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	65,002	$	11	$	(75	)	$	64,938	$	64,938	$	—
Corporate notes and bonds	184,773		7		(1,304		)	183,476		183,476		—
Equity securities	5,271		13,660		(2,902		)	16,029		—		16,029
Total Investments	$	255,046	$	13,678	$	(4,281	)	$	264,443	$	248,414	$	16,029