Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

	December 31,
	2015			2014
	(in thousands, except percentages)
Credit facility (1)	$	873,175		$	1,173,175
6.75% senior notes due November 2020	261,100			299,970
6.375% senior notes due September 2022	572,700			599,163
Net unamortized premiums	11,568			14,644
Total debt, net	1,718,543			2,086,952
Less current portion (2)	(873,175		)	—
Total long-term debt, net	$	845,368		$	2,086,952

⁽¹⁾  Variable interest rates of 3.17% and 2.67% at December 31, 2015, and December 31, 2014, respectively.

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

	December 31, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Credit facility	$	873,175	$	873,175	$	1,173,175	$	1,173,175
Senior notes, net	845,368		200,249		913,777		699,462
Total debt, net	$	1,718,543	$	1,073,424	$	2,086,952	$	1,872,637

6.75% senior notes due November 2020

Debt Instrument [Line Items]

Senior notes, expressed as percentage of principal amount redeemed, plus accrued and unpaid interest, by maturity

The Company may redeem all or any part of the November 2020 Senior Notes at any time at the redemption prices set forth below, expressed as percentages of the principal amount redeemed, plus accrued and unpaid interest:

2015	103.375	%
2016	102.250	%
2017	101.125	%
2018 and thereafter	100.000	%

6.375% senior notes due September 2022

Debt Instrument [Line Items]

Senior notes, expressed as percentage of principal amount redeemed, plus accrued and unpaid interest, by maturity

On and after March 15, 2017, the Company may redeem all or, from time to time, a part of the September 2022 Senior Notes upon not less than 30 nor more than 60 days’ notice, at the following redemption prices (expressed as a percentage of principal amount of notes to be redeemed), plus accrued and unpaid interest, if any, to the applicable redemption date (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date), if redeemed during the 12-month period beginning on March 15 of the years indicated below:

2017	103.188	%
2018	102.125	%
2019	101.063	%
2020 and thereafter	100.000	%