Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured at fair value on a recurring basis

The following fair value hierarchy table presents information about the Company's financial assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31,   2016
Assets
Deferred compensation plan	$	12,587	$	—	$	—	$	12,587
Derivative instruments	—		—		2,991		2,991
Total assets	$	12,587	$	—	$	2,991	$	15,578
Liabilities
Deferred compensation plan	$	24,169	$	—	$	—	$	24,169
Derivative instruments	—		21,400		18,859		40,259
Total liabilities	$	24,169	$	21,400	$	18,859	$	64,428

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31,   2015
Assets
Deferred compensation plan	$	12,921	$	—	$	—	$	12,921
Total assets	$	12,921	$	—	$	—	$	12,921
Liabilities
Deferred compensation plan	$	22,371	$	—	$	—	$	22,371
Total liabilities	$	22,371	$	—	$	—	$	22,371

Fair Value of Financial Assets and Liabilities Classified as Level 3

The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy:

	Year Ended December 31,
(In thousands)	2016			2015			2014
Balance at beginning of period	$	—		$	85,958		$	(3,910	)
Total gains (losses) (realized or unrealized):
Included in earnings	(17,886		)	32,864			35,067
Included in other comprehensive income	—			—			3,755
Settlements	2,018			(118,822		)	51,046
Transfers in and/or out of level 3	—			—			—
Balance at end of period	$	(15,868	)	$	—		$	85,958
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	(15,868	)	$	—		$	85,958

Carrying amounts and fair values of long-term debt

The carrying amount and fair value of debt is as follows:

	December 31, 2016				December 31, 2015
(In thousands)	Carrying Amount		Estimated Fair Value		Carrying Amount			Estimated Fair Value
Long-term debt	$	1,520,530	$	1,463,643	$	2,016,139		$	1,839,530
Current maturities	—		—		(20,000		)	(20,378		)
Long-term debt, excluding current maturities	$	1,520,530	$	1,463,643	$	1,996,139		$	1,819,152