Note 9 Stockholders' Equity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ 91,506	$ 90,952
Unrealized holding losses on derivative financial instruments	(101)	(212)
Unrecognized net actuarial losses and transition costs for benefit plans	(14,140)	(13,946)
Total	$ 77,265	$ 76,794