SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Sep. 30, 2013
Debt securities [Abstract]
Amortized cost	$ 1,011,973		$ 916,408
Gross Unrealized Gains	3,354		4,586
Gross Unrealized Losses	(44,998)		(39,801)
Debt, securities, fair value	970,329		881,193
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Amortized cost	293,069		288,026
Held-to-maturity Securities, Gross Unrealized Gains	9		13
Held-to-maturity Securities, Gross Unrealized Losses	(19,970)		(17,521)
Held-to-maturity Securities, Fair Value	273,108		270,518
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	1,011,973		916,408
Gross Unrealized Losses	(44,998)		(39,801)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	628,341		627,618
OVER 12 MONTHS, Fair Value	92,917		13,477
Fair Value	721,258		641,095
LESS THAN 12 MONTHS, Unrealized (Losses)	(34,130)		(36,985)
OVER 12 MONTHS, Unrealized (Losses)	(10,868)		(2,816)
Unrealized (Losses)	(44,998)		(39,801)
Held-to-maturity securities, continuous unrealized loss position [Abstract]
Held-to-maturity Securities, LESS THAN 12 MONTHS, Fair Value	251,744		269,429
Held-to-maturity Securities, OVER 12 MONTHS, Fair Value	19,928		0
Held-to-maturity Securities, Fair Value	271,672		269,429
Held-to-maturity Securities, LESS THAN 12 MONTHS, Unrealized (Losses)	(18,071)		(17,521)
Held-to-maturity Securities, OVER 12 MONTHS, Unrealized (Losses)	(1,899)		0
Held-to-maturity Securities, Unrealized (Losses)	(19,970)		(17,521)
Trust Preferred Securities [Member]
Debt securities [Abstract]
Amortized cost	19,331	[1]	19,318	[1]
Gross Unrealized Losses	(2,982)	[1]	(2,918)	[1]
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	19,331	[1]	19,318	[1]
Debt, securities, fair value	16,349	[1]	16,400	[1]
Gross Unrealized Losses	(2,982)	[1]	(2,918)	[1]
S&P Credit Rating, BBB- [Member] | Moody Credit Rating, Baa3 [Member] | Key Corp Capital I [Member] | Trust Preferred Securities [Member]
Debt securities [Abstract]
Amortized cost	4,985	[1]	4,984	[1]
Gross Unrealized Losses	(886)	[1]	(884)	[1]
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	4,985	[1]	4,984	[1]
Debt, securities, fair value	4,099	[1]	4,100	[1]
Gross Unrealized Losses	(886)	[1]	(884)	[1]
S&P Credit Rating, BB+ [Member] | Moody Credit Rating, Baa3 [Member] | Huntington Capital Trust II SE [Member] | Trust Preferred Securities [Member]
Debt securities [Abstract]
Amortized cost	4,976	[1]	4,976	[1]
Gross Unrealized Losses	(926)	[1]	(901)	[1]
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	4,976	[1]	4,976	[1]
Debt, securities, fair value	4,050	[1]	4,075	[1]
Gross Unrealized Losses	(926)	[1]	(901)	[1]
S&P Credit Rating, BBB [Member] | Moody Credit Rating, Baa2 [Member] | PNC Capital Trust [Member] | Trust Preferred Securities [Member]
Debt securities [Abstract]
Amortized cost	4,960	[1]	4,959	[1]
Gross Unrealized Losses	(810)	[1]	(784)	[1]
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	4,960	[1]	4,959	[1]
Debt, securities, fair value	4,150	[1]	4,175	[1]
Gross Unrealized Losses	(810)	[1]	(784)	[1]
S&P Credit Rating, A- [Member] | Moody Credit Rating, A3 [Member] | Wells Fargo (Corestates Capital) Trust [Member] | Trust Preferred Securities [Member]
Debt securities [Abstract]
Amortized cost	4,410	[1]	4,399	[1]
Gross Unrealized Losses	(360)	[1]	(349)	[1]
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	4,410	[1]	4,399	[1]
Debt, securities, fair value	4,050	[1]	4,050	[1]
Gross Unrealized Losses	(360)	[1]	(349)	[1]
Trust Preferred and Corporate Securities [Member]
Debt securities [Abstract]
Amortized cost	55,898		52,897
Gross Unrealized Gains	183		136
Gross Unrealized Losses	(4,405)		(4,249)
Debt, securities, fair value	51,676		48,784
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	55,898		52,897
Gross Unrealized Losses	(4,405)		(4,249)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	27,401		29,312
OVER 12 MONTHS, Fair Value	16,128		13,477
Fair Value	43,529		42,789
LESS THAN 12 MONTHS, Unrealized (Losses)	(1,209)		(1,433)
OVER 12 MONTHS, Unrealized (Losses)	(3,196)		(2,816)
Unrealized (Losses)	(4,405)		(4,249)
Asset Backed Securities [Member]
Debt securities [Abstract]
Amortized cost			0
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Debt, securities, fair value			0
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost			0
Gross Unrealized Losses			0
Agency and Instrumentality Securities [Member]
Debt securities [Abstract]
Amortized cost			0
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Debt, securities, fair value			0
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Amortized cost	10,001		10,003
Held-to-maturity Securities, Gross Unrealized Gains	0		0
Held-to-maturity Securities, Gross Unrealized Losses	(634)		(390)
Held-to-maturity Securities, Fair Value	9,367		9,613
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost			0
Gross Unrealized Losses			0
Held-to-maturity securities, continuous unrealized loss position [Abstract]
Held-to-maturity Securities, LESS THAN 12 MONTHS, Fair Value	9,367		9,613
Held-to-maturity Securities, OVER 12 MONTHS, Fair Value	0		0
Held-to-maturity Securities, Fair Value	9,367		9,613
Held-to-maturity Securities, LESS THAN 12 MONTHS, Unrealized (Losses)	(634)		(390)
Held-to-maturity Securities, OVER 12 MONTHS, Unrealized (Losses)	0		0
Held-to-maturity Securities, Unrealized (Losses)	(634)		(390)
Small Business Administration Securities [Member]
Debt securities [Abstract]
Amortized cost	30,026		10,099
Gross Unrealized Gains	347		482
Gross Unrealized Losses	(102)		0
Debt, securities, fair value	30,271		10,581
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	30,026		10,099
Gross Unrealized Losses	(102)		0
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	8,635		1,727
OVER 12 MONTHS, Fair Value	0		0
Fair Value	8,635		1,727
LESS THAN 12 MONTHS, Unrealized (Losses)	(102)		(153)
OVER 12 MONTHS, Unrealized (Losses)	0		0
Unrealized (Losses)	(102)		(153)
Obligations of States and Political Subdivisions [Member]
Debt securities [Abstract]
Amortized cost	1,869		1,880
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(155)		(153)
Debt, securities, fair value	1,714		1,727
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Amortized cost	20,621		19,549
Held-to-maturity Securities, Gross Unrealized Gains	9		13
Held-to-maturity Securities, Gross Unrealized Losses	(1,340)		(1,220)
Held-to-maturity Securities, Fair Value	19,290		18,342
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	1,869		1,880
Gross Unrealized Losses	(155)		(153)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	0
OVER 12 MONTHS, Fair Value	1,714
Fair Value	1,714
LESS THAN 12 MONTHS, Unrealized (Losses)	0
OVER 12 MONTHS, Unrealized (Losses)	(155)
Unrealized (Losses)	(155)
Held-to-maturity securities, continuous unrealized loss position [Abstract]
Held-to-maturity Securities, LESS THAN 12 MONTHS, Fair Value	16,589		17,253
Held-to-maturity Securities, OVER 12 MONTHS, Fair Value	1,264		0
Held-to-maturity Securities, Fair Value	17,853		17,253
Held-to-maturity Securities, LESS THAN 12 MONTHS, Unrealized (Losses)	(1,140)		(1,220)
Held-to-maturity Securities, OVER 12 MONTHS, Unrealized (Losses)	(200)		0
Held-to-maturity Securities, Unrealized (Losses)	(1,340)		(1,220)
Non Bank Qualified Obligation U S States And Political Subdivisions [Member]
Debt securities [Abstract]
Amortized cost	299,277		255,189
Gross Unrealized Gains	2		0
Gross Unrealized Losses	(18,794)		(16,460)
Debt, securities, fair value	280,485		238,729
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Amortized cost	187,237		181,547
Held-to-maturity Securities, Gross Unrealized Gains	0		0
Held-to-maturity Securities, Gross Unrealized Losses	(13,374)		(12,085)
Held-to-maturity Securities, Fair Value	173,863		169,462
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	299,277		255,189
Gross Unrealized Losses	(18,794)		(16,460)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	209,442		238,729
OVER 12 MONTHS, Fair Value	69,827		0
Fair Value	279,269		238,729
LESS THAN 12 MONTHS, Unrealized (Losses)	(11,988)		(16,460)
OVER 12 MONTHS, Unrealized (Losses)	(6,806)		0
Unrealized (Losses)	(18,794)		(16,460)
Held-to-maturity securities, continuous unrealized loss position [Abstract]
Held-to-maturity Securities, LESS THAN 12 MONTHS, Fair Value	155,200		169,462
Held-to-maturity Securities, OVER 12 MONTHS, Fair Value	18,664		0
Held-to-maturity Securities, Fair Value	173,864		169,462
Held-to-maturity Securities, LESS THAN 12 MONTHS, Unrealized (Losses)	(11,675)		(12,085)
Held-to-maturity Securities, OVER 12 MONTHS, Unrealized (Losses)	(1,699)		0
Held-to-maturity Securities, Unrealized (Losses)	(13,374)		(12,085)
Mortgage-backed Securities [Member]
Debt securities [Abstract]
Amortized cost	624,361		596,343
Gross Unrealized Gains	2,557		3,968
Gross Unrealized Losses	(21,531)		(18,939)
Debt, securities, fair value	605,387		581,372
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Amortized cost	75,210		76,927
Held-to-maturity Securities, Gross Unrealized Gains	0		0
Held-to-maturity Securities, Gross Unrealized Losses	(4,622)		(3,826)
Held-to-maturity Securities, Fair Value	70,588		73,101
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	624,361		596,343
Gross Unrealized Losses	(21,531)		(18,939)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	382,743		357,850
OVER 12 MONTHS, Fair Value	5,248		0
Fair Value	387,991		357,850
LESS THAN 12 MONTHS, Unrealized (Losses)	(20,820)		(18,939)
OVER 12 MONTHS, Unrealized (Losses)	(711)		0
Unrealized (Losses)	(21,531)		(18,939)
Held-to-maturity securities, continuous unrealized loss position [Abstract]
Held-to-maturity Securities, LESS THAN 12 MONTHS, Fair Value	70,588		73,101
Held-to-maturity Securities, OVER 12 MONTHS, Fair Value	0		0
Held-to-maturity Securities, Fair Value	70,588		73,101
Held-to-maturity Securities, LESS THAN 12 MONTHS, Unrealized (Losses)	(4,622)		(3,826)
Held-to-maturity Securities, OVER 12 MONTHS, Unrealized (Losses)	0		0
Held-to-maturity Securities, Unrealized (Losses)	(4,622)		(3,826)
Common Equities and Mutual Funds [Member]
Debt securities [Abstract]
Amortized cost	542
Gross Unrealized Gains	265
Gross Unrealized Losses	(11)
Debt, securities, fair value	796
Trust preferred securities included in available-for-sale securities [Abstract]
Amortized cost	542
Gross Unrealized Losses	(11)
Gross unrealized losses and fair value of securities in continuous unrealized loss position [Abstract]
LESS THAN 12 MONTHS, Fair Value	120
OVER 12 MONTHS, Fair Value	0
Fair Value	120
LESS THAN 12 MONTHS, Unrealized (Losses)	(11)
OVER 12 MONTHS, Unrealized (Losses)	0
Unrealized (Losses)	$ (11)

[1] Trust preferred securities are single-issuance. There are no known deferrals, defaults or excess subordination.