Quarterly report pursuant to Section 13 or 15(d)

Lease Obligations

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Lease Obligations
3 Months Ended
Mar. 31, 2012
Lease Obligations [Abstract]  
Lease Obligations

NOTE 10 LEASE OBLIGATIONS

We lease certain mining, production and other equipment under operating and capital leases. The leases are for varying lengths, generally at market interest rates and contain purchase and/or renewal options at the end of the terms. Our operating lease expense was $6.3 million for the three months ended March 31, 2012, compared with $5.8 million for the same period in 2011.

Future minimum payments under capital leases and non-cancellable operating leases at March 31, 2012 are as follows: