Geographic Information (Tables)

12 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Schedule of Revenues from External Customers by Geographical Areas

Revenues by country represent sales to unaffiliated customers as determined by the ultimate destination of our products and services, summarized for the last three fiscal years by region in the table below (in thousands):

	Year Ended September 30,
	2015		2014		2013
United States	$	474,038	$	365,085	$	374,453
Canada		101,191		137,684		113,391
Middle East and Africa		40,557		84,330		61,618
Europe (including former Soviet Union)		23,567		34,920		24,092
Far East		12,026		15,127		35,388
Mexico, Central and South America		10,479		10,668		31,925
Total revenues	$	661,858	$	647,814	$	640,867

Schedule of Long-Lived Assets by Geographical Areas

	September 30,
	2015		2014
Long-lived assets:
United States	$	95,694	$	99,711
Canada		53,879		51,493
United Kingdom		5,021		5,692
Total	$	154,594	$	156,896