Earnings per share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		For the Years Ended December 31,
(Amounts in thousands, except share and per share amounts)		2011		2010		2009
	Net income attributable to common stockholders – basic and diluted	$	79,423	$	66,429	$	132,190
	Weighted average shares outstanding – basic		5,106,568		5,105,936		5,103,790
	Dilutive effect of stock options		-		-		1,580
	Weighted average shares outstanding – diluted		5,106,568		5,105,936		5,105,370
	Net income per common share – basic	$	15.55	$	13.01	$	25.90
	Net income per common share – diluted	$	15.55	$	13.01	$	25.89