Changes in Operations (Tables)

6 Months Ended

Jun. 30, 2011

Jun. 30, 2010

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):



	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		Six Months Ended
	June 30, 2010		June 30, 2010
Operating revenues	$	182,112	$	347,842
Net income	$	22,995	$	39,793
Earnings per common share:
Basic earnings per common share from continuing operations	$	0.59	$	1.03
Diluted earnings per common share from continuing operations	$	0.55	$	0.96

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References+ Details

- Definition

Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1486-128463

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details