Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Recurring fair value measurements

Recurring fair value measurements consist of the following:

	March 31, 2018		December 31, 2017
	(In thousands)
Cash equivalent money market funds (Level 1)	$	67,846	$	121,627
Restricted cash money market funds (Level 1)	2,000		2,000

Fair value of financial instruments that are not recorded at fair value on recurring basis

The following table presents the fair value of financial instruments that are not recorded at fair value on a recurring basis:

	March 31, 2018				December 31, 2017
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In thousands)
Senior notes (Level 1)	$	739,848	$	723,976	$	745,943	$	723,867
Revolving credit facilities and term loans (Level 2)	621,118		621,616		639,689		640,562
Total debt	$	1,360,966	$	1,345,592	$	1,385,632	$	1,364,429