Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Summary Of Financial Assets And Liabilities Accounted For At Fair Value

The table below sets forth, by level, the Company’s financial assets and liabilities that are recorded at fair value in the accompanying consolidated balance sheet: 

	Fair Value at				December 31, 2015
	Total		Level 1			Level 2		Level 3
	(In thousands)
Assets:
Investments in marketable securities	$	201,910	$	11,713		$	190,197	$	—
Derivatives	9,052		5,597			1,023		2,432
Total assets	$	210,962	$	17,310		$	191,220	$	2,432
Liabilities:
Derivatives	$	—	$	—		$	—	$	—

	Fair Value at				December 31, 2014
	Total		Level 1			Level 2		Level 3
	(In thousands)
Assets:
Investments in marketable securities	$	254,099	$	5,145		$	248,954	$	—
Derivatives	13,557		9,026			1,491		3,040
Total assets	$	267,656	$	14,171		$	250,445	$	3,040
Liabilities:
Derivatives	$	766	$	—		$	766	$	—

Summary Of Change In The Fair Values Of Financial Instruments Categorized As Level 3

The following table summarizes the change in the fair values of financial instruments categorized as level 3.

	Year Ended December 31,
	2015			2014
	(In thousands)
Balance, beginning of period	$	3,040		$	4,946
Realized and unrealized losses recognized in earnings, net	(8,602		)	(6,572		)
Included in other comprehensive income	(1,341		)	—
Purchases	13,541			5,288
Issuances	(4,046		)	(622		)
Settlements	(160		)	—
Ending balance	$	2,432		$	3,040