Selected Financial Data for Transition Periods (Detail) - CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Sep. 30, 2011	Sep. 30, 2010
INTEREST INCOME
Interest and fees on loans					$ 33,460				$ 36,366
Interest and dividends on investments securities
Taxable					3,589				4,727
Tax-exempt					270				296	1,410	1,123	1,166
Other					293				683
Total interest income					37,612				42,072
INTEREST EXPENSE
Interest on deposits					4,554				7,600	15,067	25,731	32,784
Interest on borrowed money					4,159				4,224
Total interest expense					8,713				11,824
NET INTEREST INCOME	35,089	33,197	31,713	28,252	28,899	29,064	29,416	29,287	30,248	128,251	118,015	126,547
Provision for loan losses					7,445				10,483
Net interest income after provision for loan losses					21,454				19,765
NONINTEREST INCOME
Service charges and fees on deposit accounts					7,099				6,278	30,532	26,837	25,574
Mortgage and other loan income					2,681				2,642
Trust and plan administration income					1,192				1,177	4,495	4,738	4,414
Brokerage fees					532				514	3,004	2,425	2,281
Other income					650				503	3,284	2,495	5,095
Other-than-temporary impairment losses on investment securities					(180)				(534)	(503)	(879)	(2,853)
Gain on sold loan pool, net					20,796				0	0	1,900	0
Total noninterest income					32,770				10,580	76,433	47,495	45,947
NONINTEREST EXPENSE
Salaries and employee benefits					14,511				15,498	61,995	62,981	58,496
Occupancy costs					2,144				2,111	9,747	8,900	8,746
Furniture and equipment					1,870				1,725	7,867	7,044	7,739
Other real estate expenses, net					1,541				1,126
FDIC insurance and regulatory fees					830				1,180
Professional services					1,042				1,546	7,158	5,707	4,151
Advertising and marketing					789				554	3,296	3,219	3,073
Other loan expense					1,043				902
Intangible amortization					90				82	1,325	325	328
Other expense					5,026				3,846	20,946	15,182	16,572
Total noninterest expense	35,357	33,029	39,250	28,709	28,886	29,588	28,599	30,145	28,570	136,345	116,902	112,577
Income from continuing operations before taxes					25,338				1,775	48,203	(61,293)	(65,277)
Income tax expense from continuing operations	3,921	3,516	7,712	4,241	9,766				636	19,390	(17,123)	(24,388)
NET INCOME FROM CONTINUING OPERATIONS	0	0	0	0	15,572	2,881	(40,276)	(1,365)	1,139	28,813	(37,621)	(39,308)
Income from discontinued operations, net of tax	0	0	0	0	0	(1,804)	(2,724)	935	28	0	(3,565)	2,519
NET INCOME	7,823	6,667	12,584	1,739	15,572	1,077	(43,000)	(430)	1,167	28,813	(41,186)	(36,789)
Preferred stock dividends					813				813	3,250	3,250	3,252
Accretion on preferred stock discount					153				144	637	591	556
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 6,848	$ 5,694	$ 11,614	$ 770	$ 14,606	$ 113	$ (43,961)	$ (1,389)	$ 210	$ 24,926	$ (41,462)	$ (43,116)
Net income per common share from continuing operations
Basic (in Dollars per share)					$ 0.88				$ 0.01	$ 1.51	$ (2.51)	$ (2.61)
Diluted (in Dollars per share)					$ 0.88				$ 0.01	$ 1.51	$ (2.51)	$ (2.61)
Net income per common share
Basic (in Dollars per share)	$ 0.41	$ 0.34	$ 0.70	$ 0.05	$ 0.88	$ 0.01	$ (2.66)	$ (0.08)	$ 0.01	$ 1.51	$ (2.72)	$ (2.46)
Diluted (in Dollars per share)	$ 0.41	$ 0.34	$ 0.70	$ 0.05	$ 0.88	$ 0.01	$ (2.66)	$ (0.08)	$ 0.01	$ 1.51	$ (2.72)	$ (2.46)
Average common shares outstanding
Basic (in Shares)					16,527				16,527	16,527	16,527	16,511
Diluted (in Shares)					16,527				16,529	16,529	16,527	16,511