Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies

Schedule of outstanding purchase commitments

		March 31,		December 31,
		2015		2014
Capital Commitments
	Equipment	$	30,973	$	11,751
	Land		23,678		24,663
Supplies and Services
	Coal purchase commitments	$	2,589	$	2,592
	Transportation agreements		673,644		691,530
	Materials and supplies		11,237		12,185