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Bank and Other Notes Payable: (Details 2) (Bank and other notes payable, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Bank and other notes payable
 
Future maturities of bank and other notes payable  
2013 $ 24,027
2016 675,000
Thereafter 125,000
Long term debt including debt premium $ 824,027