INTEREST EXPENSE

3 Months Ended

Mar. 31, 2014

Interest Expense [Abstract]

INTEREST EXPENSE

INTEREST EXPENSE

Interest expense comprised the following for the three months ended March 31, 2014 and 2013:

	For the Three Months Ended March 31,
	2014		2013
Interest on Senior Notes	$	18,275	$	25,485
Interest on 2015 Convertible Notes	3,263		3,412
Interest on capital leases and other financing arrangements	187		136
	21,725		29,033
Amortization of capitalized debt issuance costs	4,244		1,144
Amortization of debt issuance discount and premium, net	1,952		1,836
	6,196		2,980
Total interest expense	$	27,921	$	32,013

We paid interest of US$ 22.1 million and US$ 36.4 millionduring the three months ended March 31, 2014 and 2013, respectively.