Pension and Retirement Plans (Detail) - Components of net periodic benefit costs - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension:
Pension:
Service cost	$ 10	$ 9
Interest cost	104	162
Expected return on plan assets	(65)	(97)
Amortization of:
Prior service gain	0	0
Amortization of net gain	90	44
Net periodic benefit cost	139	118
Post Retirement:
Pension:
Service cost	10	7
Interest cost	10	11
Amortization of:
Amortization of net gain	4	(21)
Net periodic benefit cost	24	(3)
Foreign | Pension:
Pension:
Service cost	10	9
Interest cost	93	151
Expected return on plan assets	(65)	(97)
Amortization of:
Prior service gain	0	0
Amortization of net gain	91	45
Net periodic benefit cost	129	108
Foreign | Post Retirement:
Pension:
Service cost	0	0
Interest cost	0	0
Amortization of:
Amortization of net gain	0	0
Net periodic benefit cost	0	0
U.S. | Pension:
Pension:
Service cost	0	0
Interest cost	11	11
Expected return on plan assets	0	0
Amortization of:
Prior service gain	0	0
Amortization of net gain	(1)	(1)
Net periodic benefit cost	10	10
U.S. | Post Retirement:
Pension:
Service cost	10	7
Interest cost	10	11
Amortization of:
Amortization of net gain	4	(21)
Net periodic benefit cost	$ 24	$ (3)