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Derivatives and Hedging Activities (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Derivative [Line Items]
Gain (loss) on derivative instruments	$ 0
Other comprehensive income (loss) on long term borrowing hedge, net of tax	1,768,000	$ (2,687,000)
Derivative asset, fair value, gross asset	9,656,000		$ 11,879,000
Derivative liability, fair value, gross liability	21,980,000		27,400,000
Interest rate swap agreements
Derivative [Line Items]
Customer derivatives program	474,900,000		439,416,000
Notional amount	54,155,000		54,815,000
Interest rate contracts | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	9,656,000		11,879,000
Interest rate contracts | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	9,656,000		11,879,000
Commercial loan hedge | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	0		0
Commercial loan hedge | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	565,000		966,000
Long term borrowing hedge | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	0		0
Long term borrowing hedge | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	11,759,000		14,555,000
Forward Contracts | Interest rate swap agreements
Derivative [Line Items]
Notional amount	$ 400,000,000		$ 400,000,000

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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-Publisher SEC
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