Defined Benefit Pension and Other Postretirement Plans (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits
Defined Benefit Plan Disclosure
Contribution made to Pension Plan	$ 2,467,000	$ 2,783,000
Expected contribution to pensions plans in the remainder of current fiscal year	7,400,000
VEBA
Defined Benefit Plan Disclosure
Contribution made to Pension Plan	$ 0	$ 0