| http://www.w3.org/ns/prov#value | - These obligations represent contracts and other commitments that are known and non-cancellable: Payments Due by Year(000s) 2012 2013 2014 2015 2016 andThereafter TotalOperating leases $637 $2,266 $2,121 $526 $- $5,550Flow-through obligations - 35,953 - - - 35,953Firm transportation agreements 7,246 29,693 21,609 12,171 1,058 71,777Bank debt(1) - - - 235,382 - 235,382 $7,883 $67,912 $23,730 $248,07
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