Long-lived Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	$ 93,528	$ 71,486
United States
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	46,712	35,577
Canada
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	32,078	29,696
Colombia
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	7,554
Russian Federation
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	6,820	5,760
United Kingdom
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	350	442
China
Schedule Of Long Lived Assets [Line Items]
Total Long-lived assets	$ 14	$ 11