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

12 Months Ended

Dec. 31, 2012

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, 2012			December 31, 2011			December 31, 2012			December 31, 2011
Principal amount of debt component	$	83,896		$	115,000		$	—		$	62,150
Unamortized discount	(5,769		)	(9,851		)	—			(48		)
Carrying amount of debt component	$	78,127		$	105,149		$	—		$	62,102
Carrying amount of equity component	$	3,654		$	13,134		$	—		$	20,293
Effective interest rate	8.1		%	8.1		%	—		%	7.0		%
Period through which discount is being amortized, put date	01/2017			01/2017			—			01/2012
Aggregate if-converted value in excess of aggregate principal amount	$	42,579		$	7,907		$	—		$	—

Statements of Operations:	2012		2011		2010
6.00% Convertible Guaranteed Notes
Coupon interest	$	6,634	$	6,900	$	6,408
Discount amortization	1,868		1,938		1,776
	$	8,502	$	8,838	$	8,184
5.45% Exchangeable Guaranteed Notes
Coupon interest	$	188	$	3,387	$	3,504
Discount amortization	34		664		689
	$	222	$	4,051	$	4,193

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
2013	$	—
2014	—
2015	—
2016	—
2017(1)	83,896
Thereafter	129,120
	213,016
Debt discount	(5,769		)
	$	207,247

(1) Although the 6.00% Convertible Guaranteed Notes mature in 2030, the notes can be put to the Company in 2017. See note 22 for subsequent events.