LONG-TERM DEBT (Tables)

6 Months Ended

Jun. 30, 2013

LONG-TERM DEBT

Schedule of long-term obligations

(in thousands)	June 30, 2013		December 31, 2012
Convertible Subordinated Notes Due 2015	$	172,460	172,500
Convertible Subordinated Notes Due 2023	287,500		—
Total	$	459,960	$	172,500