LONG TERM DEBT (TABLES)

6 Months Ended

Jun. 30, 2012

Notes To Consolidated Financial Statement [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	June 30, 2012		December 31, 2011
1.375% Convertible Senior Notes	$	500,000	$	-
Discount on 1.375% Convertible Senior Notes		(77,764)		-
1.375% Convertible Senior Notes, net of discount		422,236		-
2.5% Contingent Convertible Senior Notes		168,926		169,145
1.5% Contingent Convertible Senior Notes		181		181
		591,343		169,326
Less current portion		(181)		(169,145)
Total long-term debt	$	591,162	$	181

Schedule Of Interest Expense [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2012		2011		2012		2011
1.375% Notes:
Coupon rate interest	$	850	$	-	$	850	$	-
Amortization of discount		1,750		-		1,750		-
Amortization of issuance costs		296		-		296		-
Total 1.375% Notes		2,896		-		2,896		-
2.5% Notes:
Coupon rate interest		1,057		1,057		2,114		2,114
Contingent interest		70		70		70		70
Total 2.5% Notes		1,127		1,127		2,184		2,184
1.5% Notes:
Coupon rate interest		1		1		2		2
Total 1.5% Notes		1		1		2		2
Total interest expense
related to long-term debt	$	4,024	$	1,128	$	5,082	$	2,186