Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Measurements [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present our assets and liabilities measured at fair value on a recurring basis at December 31, 2017 and December 31, 2016:

(In thousands) December 31, 2017	Level 3		Gross Fair Value		Netting (1)		Net Fair Value
Assets:
Cash Convertible Notes Hedges		134,079		134,079		—		134,079
Liabilities:
Cash Conversion Derivative		134,079		134,079		—		134,079

(In thousands) December 31, 2016	Level 3		Gross Fair Value		Netting (1)		Net Fair Value
Assets:
Cash Convertible Notes Hedges		48,361		48,361		—		48,361
Liabilities:
Cash Conversion Derivative		48,361		48,361		—		48,361

(1) This column reflects the impact of netting derivative assets and liabilities by counterparty when a legally enforceable master netting agreement exists.

Financial Instruments Measured at Fair Value on Recurring Basis Using Unobservable Inputs

The following table presents our financial instruments measured at fair value on a recurring basis using unobservable inputs (Level 3):

(In thousands)	Balance at December 31, 2016			Purchases of Level 3 Instruments		Settlements of Level 3 Instruments		Gains (Losses) Included in Earnings			Balance at December 31, 2017
Cash Convertible Notes Hedges	$	48,361		$	—	$	—	$	85,718		$	134,079
Cash Conversion Derivative		(48,361	)		—		—		(85,718	)		(134,079	)