Investment Securities (Amortized Cost And Fair Value Of Securities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	$ 171,152	$ 165,274
Available-for-Sale, Gross Unrealized Gains	7,183	9,311
Available-for-Sale, Gross Unrealized Losses	(316)	(92)
Available-for-Sale, Fair Value	178,019	174,493
Held-to-Maturity, Amortized Cost	2,955	3,166
Held-to-Maturity, Gross Unrealized Gains	388	488
Held-to-Maturity, Gross Unrealized Losses	0	0
Held-to-Maturity, Fair Value	3,343	3,654
Agency bonds and notes
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost		1,024
Available-for-Sale, Gross Unrealized Gains		8
Available-for-Sale, Gross Unrealized Losses		0
Available-for-Sale, Fair Value		1,032
Agency Mortgage-Backed
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	38,941	46,376
Available-for-Sale, Gross Unrealized Gains	467	1,029
Available-for-Sale, Gross Unrealized Losses	(68)	0
Available-for-Sale, Fair Value	39,340	47,405
Held-to-Maturity, Amortized Cost	187	260
Held-to-Maturity, Gross Unrealized Gains	17	23
Held-to-Maturity, Gross Unrealized Losses	0	0
Held-to-Maturity, Fair Value	204	283
Agency CMO
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	14,259	16,053
Available-for-Sale, Gross Unrealized Gains	32	108
Available-for-Sale, Gross Unrealized Losses	(56)	(66)
Available-for-Sale, Fair Value	14,235	16,095
Privately issued CMO
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	1,873	2,359
Available-for-Sale, Gross Unrealized Gains	205	293
Available-for-Sale, Gross Unrealized Losses	(19)	0
Available-for-Sale, Fair Value	2,059	2,652
Privately issued ABS
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	2,956	3,675
Available-for-Sale, Gross Unrealized Gains	813	864
Available-for-Sale, Gross Unrealized Losses	0	(7)
Available-for-Sale, Fair Value	3,769	4,532
SBA certificates
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	1,047	1,220
Available-for-Sale, Gross Unrealized Gains	3	7
Available-for-Sale, Gross Unrealized Losses	0	0
Available-for-Sale, Fair Value	1,050	1,227
Municipal obligations
Schedule of Cost-method Investments [Line Items]
Available-for-Sale, Amortized Cost	112,076	94,567
Available-for-Sale, Gross Unrealized Gains	5,663	7,002
Available-for-Sale, Gross Unrealized Losses	(173)	(19)
Available-for-Sale, Fair Value	117,566	101,550
Held-to-Maturity, Amortized Cost	2,768	2,906
Held-to-Maturity, Gross Unrealized Gains	371	465
Held-to-Maturity, Gross Unrealized Losses	0	0
Held-to-Maturity, Fair Value	$ 3,139	$ 3,371

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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-Publisher FASB
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