March 31,
2012

December 31,
2011

$925 Million Credit Facility, interest at LIBOR plus 2.25% or bank’s base rate plus 1.25%, maturing August 1, 2015

$

585,000

$

600,000

Convertible Senior Notes, interest at 3.75%, maturing October 1, 2014, net of unamortized discount of $37,447 and $40,754

322,553

319,246

Senior Notes, interest at 6.75%, maturing November 15, 2014

152,180

152,180

Capital lease obligations

2,212

2,399

Total debt

1,061,945

1,073,825

Less amounts due within one year

(763

)

(755

)

Total long-term debt

$

1,061,182

$

1,073,070