COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Gross value and accumulated amortization of property, plant and equipment and mine development assets under capital leases

The following shows the gross value and accumulated amortization of property, plant and equipment and mine development assets under capital leases related primarily to the leasing of mining equipment as of December 31:

	2014		2013
	(In thousands)
Gross value	$	74,203	$	24,982
Accumulated amortization	21,598		11,983

Future minimum capital and operating lease payments

Future minimum capital and operating lease payments as of December 31, 2014, are as follows:

	Capital Leases			Operating Leases
	(In thousands)
2015	$	41,927		$	16,886
2016	38,997			10,098
2017	28,273			6,554
2018	5,313			5,072
2019	2,346			4,231
Thereafter	198			3,942
Total minimum lease payments	117,054			$	46,783
Less imputed interest	(7,703		)
Present value of minimum capital lease payments	$	109,351