Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Activity related to unrecognized tax benefits
Balance at beginning of the year	$ 810	[1]	$ 705	[1]	$ 5,146	[1]
Increases related to prior year tax positions	0	[1]	105	[1]	120	[1]
Increases related to current year tax positions	0	[1]	0	[1]	319	[1]
Decreases related to the expiration of statue of limitation / settlement of audits	(810)	[1]	0	[1]	(4,880)	[1]
Balance at the end of the year	$ 0	[1]	$ 810	[1]	$ 705	[1]

[1] Restated