Investments in Available-for-Sale Securities (Tables)

12 Months Ended

Dec. 31, 2015

Available-for-sale Securities [Abstract]

Available-for-sale Securities

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

	December 31, 2015
										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	$	10,007	$	—	$	(12	)	$	9,995	$	9,995
Corporate notes and bonds	190,496		—		(299		)	190,197		190,197		—
Equity securities	3,938		668		(2,888		)	1,718		—		1,718
Total Investments	$	204,441	$	668	$	(3,199	)	$	201,910	$	200,192	$	1,718

	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