Notes Payable Level 3 (Tables)

6 Months Ended

Jun. 30, 2012

Debt Instrument [Line Items]

Convertible Notes Payable [Table Text Block]

	June 30, 2012								December 31, 2011
	September 2015 Notes			December 2029 Notes			December 2024 Notes		September 2015 Notes			December 2029 Notes			December 2024 Notes
	(Dollars in thousands)
Notes payable:
Principal amount of liability component	$	200,000		$	115,839		$	28,243	$	200,000		$	115,839		$	28,243
Unamortized discount	(25,494		)	(14,993		)	—		(28,906		)	(17,568		)	—
Net carrying amount of liability component	$	174,506		$	100,846		$	28,243	$	171,094		$	98,271		$	28,243
Additional paid-in capital:
Carrying amount of equity component				$	15,586		$	22,637				$	15,586		$	22,637
Amount by which the if-converted value exceeds principal	$	—		$	15,781		$	—	$	—		$	8,489		$	—