Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

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,   2018
Assets
Deferred compensation plan	$	14,699	$	—	$	—	$	14,699
Derivative instruments	—		35,689		24,416		60,105
Total assets	$	14,699	$	35,689	$	24,416	$	74,804
Liabilities
Deferred compensation plan	$	25,780	$	—	$	—	$	25,780
Derivative instruments	—		—		2,440		2,440
Total liabilities	$	25,780	$	—	$	2,440	$	28,220

(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,   2017
Assets
Deferred compensation plan	$	14,966	$	—	$	—	$	14,966
Derivative instruments	—		—		2,239		2,239
Total assets	$	14,966	$	—	$	2,239	$	17,205
Liabilities
Deferred compensation plan	$	29,145	$	—	$	—	$	29,145
Derivative instruments	—		—		30,637		30,637
Total liabilities	$	29,145	$	—	$	30,637	$	59,782

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)	2018			2017			2016
Balance at beginning of period	$	(28,398	)	$	(15,868	)	$	—
Total gain (loss) included in earnings	31,184			(1,866		)	(17,886		)
Settlement (gain) loss	19,190			(10,664		)	2,018
Transfers in and/or out of Level 3	—			—			—
Balance at end of period	$	21,976		$	(28,398	)	$	(15,868	)
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	19,732		$	(28,398	)	$	(15,868	)

Carrying amounts and fair values of long-term debt

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

	December 31, 2018				December 31, 2017
(In thousands)	Carrying Amount		Estimated Fair Value		Carrying Amount			Estimated Fair Value
Long-term debt	$	1,226,104	$	1,202,994	$	1,521,891		$	1,527,624
Current maturities	—		—		(304,000		)	(312,055		)
Long-term debt, excluding current maturities	$	1,226,104	$	1,202,994	$	1,217,891		$	1,215,569