Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies

Schedule of outstanding purchase commitments

		June 30,		December 31,
		2015		2014
Capital Commitments
	Equipment	$	20,241	$	11,751
	Land		23,678		24,663
Supplies and Services
	Coal purchase commitments	$	2,110	$	2,592
	Transportation agreements		649,419		691,530
	Materials and supplies		10,290		12,185