DEBT (Tables)

12 Months Ended

Dec. 31, 2017

Schedule Of Debt Outstanding

Debt outstanding consists of the following (in thousands):

	December 31,
	2017			2016
$900.0 Million Revolving Credit Facility, principal due at maturity in July 2020; interest payable periodically at variable interest rates. The weighted average rate at December 31, 2017 and 2016 was 3.1% and 2.2%, respectively.	$	199,000		$	435,000
Term Loan, scheduled principal payments through maturity in July 2020; interest payable periodically at variable interest rates. The rate at December 31, 2017 and 2016 was 3.1% and 2.3%, respectively.  Unamortized debt issuance costs amounted to $0.3 million and $0.4 million at December 31, 2017 and 2016, respectively.		85,000			95,000
4.625% Senior Notes, principal due at maturity in May 2023; interest payable semi-annually in May and November at 4.625%. Unamortized debt issuance costs amounted to $3.3 million and $3.9 million at December 31, 2017 and 2016, respectively.		350,000			350,000
4.125% Senior Notes, principal due at maturity in April 2020; interest payable semi-annually in April and October at 4.125%. Unamortized debt issuance costs amounted to $1.9 million and $2.7 million at December 31, 2017 and 2016, respectively.		325,000			325,000
5.0% Senior Notes, principal due at maturity in October 2022; interest payable semi-annually in April and October at 5.0%. Unamortized debt issuance costs amounted to $2.3 million and $2.8 million at December 31, 2017 and 2016, respectively.		250,000			250,000
4.75% Senior Notes, principal due at maturity in October 2027; interest payable semi-annually in April and October at 4.75%. Unamortized debt issuance costs amounted to $4.0 million at December 31, 2017.		250,000			—
Total debt		1,459,000			1,455,000
Unamortized debt issuance costs		(11,813	)		(9,831	)
Current portion of long-term debt		(10,000	)		(10,000	)
Long-term debt, net	$	1,437,187		$	1,435,169

Schedule of Principal Payments

Scheduled principal payments as of December 31, 2017 for the next five years and thereafter were as follows (in thousands):

2018	$	10,000
2019		15,000
2020		584,000
2021		—
2022		250,000
Thereafter		600,000
Total debt	$	1,459,000