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Leases
12 Months Ended
Dec. 31, 2011
Capital Leases of Lessee [Abstract]  
Leases of Lessee Disclosure [Text Block]

14.       Leases

We lease land, buildings and equipment under agreements that expire in various years through 2095. Rental expense under operating leases was $5.4 million, $5.1 million and $5.3 million for the years ended December 31, 2011, 2010 and 2009, respectively.  The table below reflects the future minimum lease payments due under non-cancelable leases at December 31, 2011.  These commitments relate principally to the lease of our office headquarters, underground gas storage facilities, vehicles and computer equipment.

                 Later   
Thousands 2012  2013  2014  2015  2016  years  Total
Operating leases$ 4,929 $ 4,841 $ 5,078 $ 5,042 $ 5,018 $ 24,659 $ 49,567
Capital leases  443   313   118   23   -   -   897
Minimum lease payments$ 5,372 $ 5,154 $ 5,196 $ 5,065 $ 5,018 $ 24,659 $ 50,464