Borrowings (Tables)

9 Months Ended

Sep. 30, 2011

Borrowings [Line Items]

Principal Repayments

	September 30,
	2011
Principal repayments for the following years
2011	$	16,264
2012		56,687
2013		303,372
2014		0
2015 and beyond		958,715
Total	$	1,335,038

Convertible Senior Notes Due 2013 [Member]

Borrowings [Line Items]

Total Obligations Under Debt Arrangement

	September 30,			December 31,
	2011			2010
Convertible Senior Notes	$	310,000		$	310,000
Unamortized debt discount		(1,291	)		(2,311	)
Debt discount related to ASC 470-20		(5,337	)		(8,567	)
Total	$	303,372		$	299,122

Senior Secured Notes Due 2016 [Member]

Borrowings [Line Items]

Total Obligations Under Debt Arrangement

	September 30,			December 31,
	2011			2010
Senior Secured Notes due 2016	$	962,060			955,296
Unamortized debt discount		(3,345	)		(3,660	)
Total	$	958,715		$	951,636