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Quarterly Data (unaudited)
 12 Months Ended
Sep. 30, 2017
Quarterly Financial Data [Abstract]  
Quarterly Data (unaudited)
QUARTERLY DATA (unaudited)
The following quarterly information includes all adjustments (consisting only of normal recurring adjustments) which we consider necessary for a fair presentation of such information. Quarterly results fluctuate because of the seasonal nature of the Company’s businesses.
 
December 31,
 
March 31,
 
June 30,
 
September 30,
 
2016
 
2015
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Revenues
$
261,413

 
$
197,982

 
$
359,940

 
$
322,047

 
$
146,692

 
$
140,283

 
$
119,543

 
$
108,172

Operating income
$
82,236

 
$
48,296

 
$
116,408

 
$
114,481

 
$
27,671

 
$
29,815

 
$
1,992

 
$
8,309

Net income (loss)
$
44,265

 
$
23,351

 
$
65,125

 
$
63,294

 
$
10,697

 
$
12,603

 
$
(4,046
)
 
$
(1,875
)