5. INVESTMENT SECURITIES (Detail) - (Table 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Asset-backed Securities, Securitized Loans and Receivables [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	$ 190,195
Investments securities not due at a single maturity date	2,740
Asset-backed Securities, Securitized Loans and Receivables [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	196,430
Investments securities not due at a single maturity date	2,916
Equity Securities, Industry [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	64
Equity Securities, Industry [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	61
Total [ Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	219,510
Investments securities not due at a single maturity date	2,740
Total [ Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Investment securities not due at a single maturity date:
Investments securities not due at a single maturity date	227,906
Investments securities not due at a single maturity date	2,916
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Within one year	875
After one year through five years	3,247
After five years through ten years	11,156
After ten years	13,973
	29,251
Estimate of Fair Value, Fair Value Disclosure [Member]
Within one year	879
After one year through five years	3,389
After five years through ten years	12,003
After ten years	15,144
	$ 31,415