Earnings Per Share (CPE Inc. Only) (Tables) (Cloud Peak Energy Inc.)

6 Months Ended

Jun. 30, 2013

Cloud Peak Energy Inc.

Summary of calculation of diluted earnings per share

The following table summarizes the calculation of diluted earnings per share (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Numerator for calculation of diluted earnings per share:
Net income	$	4,709	$	33,678	$	20,104	$	60,296
Denominator for basic income per share — weighted-average shares outstanding	60,629		60,015		60,619		60,011
Dilutive effect of stock equivalents	536		855		504		815
Denominator for diluted earnings per share	61,165		60,870		61,123		60,826
Diluted earnings per share	$	0.08	$	0.55	$	0.33	$	0.99

Schedule of anti-dilutive securities excluded from diluted earnings per share calculation

For the periods presented, the following items were excluded from the diluted earnings per share calculation because they were anti-dilutive (in thousands):

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2013	2012	2013	2012
Restricted stock and units	—	6	36	110
Options outstanding	68	—	98	—
Employee stock purchase plan	—	7	56	3