Convertible Notes, Exchangeble Notes and Trust Preferred Securities (Tables)

12 Months Ended

Dec. 31, 2011

Debt Instrument [Line Items]

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

Below is a summary of additional disclosures related to the 6.00% Convertible Guaranteed Notes and the 5.45% Exchangeable Guaranteed Notes.

	6.00% Convertible Guaranteed Notes						5.45% Exchangeable Guaranteed Notes
Balance Sheets:	December 31, 2011			December 31, 2010			December 31, 2011			December 31, 2010
Principal amount of debt component	$	115,000		$	115,000		$	62,150		$	62,150
Unamortized discount	(9,851		)	(11,789		)	(48		)	(712		)
Carrying amount of debt component	$	105,149		$	103,211		$	62,102		$	61,438
Carrying amount of equity component	$	13,134		$	13,134		$	20,293		$	20,293
Effective interest rate	8.1		%	7.5		%	7.0		%	7.0		%
Period through which discount is being amortized, put date	01/2017			01/2017			01/2012			01/2012
Aggregate if-converted value in excess of aggregate principal amount	$	7,907		$	14,036		$	—		$	—

Statements of Operations:	2011		2010		2009
6.00% Convertible Guaranteed Notes
Coupon interest	$	6,900	$	6,408	$	—
Discount amortization	1,938		1,776		—
	$	8,838	$	8,184	$	—
5.45% Exchangeable Guaranteed Notes
Coupon interest	$	3,387	$	3,504	$	7,554
Discount amortization	664		689		1,479
	$	4,051	$	4,193	$	9,033

Convertible Notes, Exchangeable Notes, and Trust Preferred Securities [Member]

Debt Instrument [Line Items]

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

Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows:

Year ending December 31,	Total
2012(1)	$	62,150
2013	—
2014	—
2015	—
2016	—
Thereafter	244,120
	306,270
Debt discounts	(9,899		)
	$	296,371

(1) Although the 5.45% Exchangeable Guaranteed Notes matured in 2027, the notes were put to the Company in 2012.