DEBT AND FINANCING ARRANGEMENTS (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Scheduled debt maturity

The scheduled maturity of the Company's aggregate amount of its debt obligation on its consolidated balance sheet at December 31, 2017 is shown in the following table :

Year ended December 31,
2018	$	—
2019	250,000
2020	500,000
2021	—
2022	—
After 2022	636,060
Unamortized discount and debt issuance expenses	(9,531		)
Total senior notes and notes payable	$	1,376,529