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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Net income		$ 18,275	$ 12,058
Other comprehensive income:
Unrealized gain on pension plan obligation	[1]	534	648
Tax effect of unrealized gain on pension plan		(216)	(267)
Total other comprehensive income		318	381
Total comprehensive income		$ 18,593	$ 12,439
[1] This item is included in the computation of net periodic pension cost.

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