Income Taxes (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Income Taxes
Federal tax and interest overpayments	$ (1,730,000)
Decrease in consolidated net earnings		(5,436,000)
Decrease in per diluted share		(0.12)
Refunds tax	$ 1,060,000