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Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Federal corporate tax rate	35.00%	35.00%	35.00%
Increase in net liability for unrecognized tax benefits	$ 2,159,000	$ 259,000
Accrued interest expense (benefit)	389,000	(224,000)
Gross liability for unrecognized tax benefits	10,827,000	7,482,000	7,531,000
Unrecognized tax benefits that would impact our effective tax rate	6,920,000	4,761,000
Interest included in total liability	3,384,000	2,995,000
Significant increases or decreases for uncertain tax positions	$ 0

X

- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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