Quarterly report pursuant to Section 13 or 15(d)

Comprehensive Income (Details)

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Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Comprehensive Income    
Net income $ 17,704 $ 17,482
Foreign currency translation adjustments 4,231 3,929
Comprehensive income $ 21,935 $ 21,411