COMMITMENTS AND CONTINGENCIES (Tables)

3 Months Ended

Mar. 31, 2013

Summary of Standby Letters of Credit

standby letter of credit in accordance with its terms. Our standby letters of credit as of March 31, 2013 are summarized by purpose in the table below:

in thousands
Standby Letters of Credit
Risk management insurance	$34,840
Industrial revenue bond	14,230
Reclamation/restoration requirements	7,862
Total	$56,932