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LEASE OBLIGATIONS | 6 Months Ended
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Jun. 30, 2017
Leases [Abstract] |
LEASE OBLIGATIONS | NOTE 10 - LEASE OBLIGATIONS We lease certain mining, production and other equipment under operating and capital leases. The capital 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 $1.8 million and $3.5 million for the three and six months ended June 30, 2017, compared with $2.2 million and $4.6 million for the comparable periods in 2016. Future minimum payments under capital leases and non-cancellable operating leases at June 30, 2017 are as follows:
| (In Millions)
| Capital Leases |  | Operating Leases
2017 (July 1 - December 31) | $ | 11.7 |  |  | $ | 3.6 |
2018 | 18.9 |  |  | 5.8 |
2019 | 10.5 |  |  | 2.9 |
2020 | 9.5 |  |  | 2.9 |
2021 | 8.8 |  |  | 3.0 |
2022 and thereafter | 0.6 |  |  | — |
Total minimum lease payments | $ | 60.0 |  |  | $ | 18.2 |
Amounts representing interest | 10.0 |  |  |
Present value of net minimum lease payments 1 | $ | 50.0 |  |  |
1 The total is comprised of $17.4 million and $32.6 million classified as Other current liabilities and Other liabilities, respectively, in the Statements of Unaudited Condensed Consolidated Financial Position at June 30, 2017.

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 1,3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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