Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes (Textual) [Abstract]
Income tax expense (benefit)	$ (68,612,000)	$ (114,337,000)	$ 9,481,000
Additional Income tax expense, including interest and penalties	1.4
Additional Income tax expense, including interest and penalties for open tax years	11.8
Additional Income Taxes (Textual) [Abstract]
Interest and penalties associated with uncertain tax positions	0	0	0
Cumulative amount of temporary differences related to investments in foreign subsidiaries	$ 0