Changes in Operations (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2010

Changes in Operations [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The preliminary acquisition-date fair values assigned to the acquired net assets were as follows (dollars in thousands):

Accounts receivable	$	2,799
Prepaid expenses and other	2,319
Property and equipment	90,120
Total assets	95,238
Accounts payable	2,275
Accrued expenses	3,468
Net assets	$	89,495

The preliminary acquisition-date fair values assigned to the acquired net assets were as follows (dollars in thousands):

	Australian Dollars		United States Dollars
Accounts receivable	$	161	$	155
Materials and supplies	3,328		3,209
Prepaid expenses and other	101		97
Deferred income tax assets	171		165
Property and equipment	330,712		318,843
Total assets	334,473		322,469
Accrued expenses	731		705
Long-term debt	1,806		1,741
Net assets	$	331,936	$	320,023

Business Acquisition, Pro Forma Information [Table Text Block]

The following pro forma financial results do not include the impact of any potential operating efficiencies, savings from expected synergies, costs to integrate the operations or costs necessary to achieve savings from expected synergies or the impact of derivative instruments that the Company has entered into or may enter into to mitigate interest rate or currency exchange rate risk (dollars in thousands, except per share amounts):

	Three Months Ended		Nine Months Ended
	September 30, 2010		September 30, 2010
Operating revenues	$	182,070	$	529,912
Net income	$	27,315	$	67,108
Earnings per common share:
Basic earnings per common share from continuing operations	$	0.63	$	1.66
Diluted earnings per common share from continuing operations	$	0.59	$	1.55