Quarterly Results Of Operations (Tables)

12 Months Ended

Aug. 31, 2017

Quarterly Results Of Operations [Abstract]

Schedule of Quarterly Results

	First		Second		Third		Fourth
($ in thousands, except per share amounts)	Quarter		Quarter(1)		Quarter		Quarter
Year ended August 31, 2017
Operating revenues	$	110,390	$	124,125	$	151,533	$	131,937
Cost of operating revenues	$	82,016	$	91,184	$	105,627	$	94,146
Earnings before income taxes	$	1,335	$	7,636	$	16,197	$	10,547
Net earnings	$	873	$	5,012	$	10,952	$	6,342
Diluted net earnings per share	$	0.08	$	0.47	$	1.02	$	0.59
Year ended August 31, 2016
Operating revenues	$	121,622	$	120,573	$	141,319	$	132,897
Cost of operating revenues	$	87,208	$	88,128	$	99,511	$	92,951
Earnings (loss) before income taxes	$	10,396	$	(6,193)	$	14,065	$	11,020
Net earnings (loss)	$	6,944	$	(4,129)	$	9,644	$	7,808
Diluted net earnings (loss) per share	$	0.62	$	(0.37)	$	0.90	$	0.73
(1) The second quarter 2016 results were affected by an environmental charge reducing net earnings by $8.5 million.