Summary of Significant Accounting Policies (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income (loss) - numerator
Net loss	$ (9,197)	$ 6,194	$ (12,073)	$ (14,249)
Less dividends to Class B shareholders - distributed earnings		(69)	(28)	(206)
Undistributed (loss) earnings	$ (9,197)	$ 6,125	$ (12,101)	$ (14,455)
Weighted average common shares outstanding - denominator
Weighted average common shares outstanding for basic earnings (loss) per share	55,271	42,751	53,519	42,702
Total diluted weighted average common shares outstanding	55,271	42,879	53,519	42,702
Class A [Member]
Weighted average common shares outstanding - denominator
Weighted average common shares outstanding for basic earnings (loss) per share	55,271	41,720	53,379	41,671
Dilutive effect of options and restricted stock units		128
Total diluted weighted average common shares outstanding	55,271	41,848	53,379	41,671
Basic
Distributed earnings
Undistributed (loss) earnings	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Total	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Diluted
Distributed earnings
Undistributed (loss) earnings	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Total	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Class B [Member]
Weighted average common shares outstanding - denominator
Weighted average common shares outstanding for basic earnings (loss) per share		1,031	140	1,031
Total diluted weighted average common shares outstanding		1,031	140	1,031
Basic
Distributed earnings		$ 0.07	$ 0.20	$ 0.20
Undistributed (loss) earnings		$ 0.14	$ (0.23)	$ (0.34)
Total		$ 0.21	$ (0.03)	$ (0.14)
Diluted
Distributed earnings		$ 0.07	$ 0.20	$ 0.20
Undistributed (loss) earnings		$ 0.14	$ (0.23)	$ (0.34)
Total		$ 0.21	$ (0.03)	$ (0.14)