SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Summary of Estimated Fair Value for Financial instruments

A summary of the estimated fair value for financial instruments follows.

	June 30, 2014				December 31, 2013
	Carrying value		Estimated fair value (Level 2)		Carrying value		Estimated fair value (Level 2)
	(In thousands)
Revolving credit facility	$	426,000	$	426,000	$	286,000	$	286,000
7.5% Senior notes	300,000		326,500		300,000		314,625

Deferred Revenue, by Arrangement, Disclosure

A rollforward of current and noncurrent deferred revenue follows.

	Six months ended June 30, 2014
	Current		Noncurrent
	(In thousands)
Deferred revenue, beginning of period	$	1,555	$	29,683
Additions	2,609		7,410
Less: revenue recognized due to expiration	1,555		—
Deferred revenue, end of period	$	2,609	$	37,093