FAIR VALUE DISCLOSURES (Additional Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2011
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Mortgage servicing rights	$ 3,000		$ 3,000
Weighted average interest rate, residential mortgages (in hundredths)			4.18%
Weighted average maturity of residential mortgages			19 years
Discount rate used to estimate fair value (in hundredths)			9.30%		9.20%
Subtotal	2,335,331		2,335,331		2,257,844
Valuation allowance	50,635	51,817	50,635	51,817	51,445	50,818	52,757	53,400
Recoveries	186	411	765	702
Prepayment Speed used in unobservable assumptions			229		392
Commercial Real Estates [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			0.00%
Commercial Real Estates [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			50.00%
Inventory Finished Goods [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			35.00%
Inventory Finished Goods [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			65.00%
Finished Goods [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			30.00%
Finished Goods [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			60.00%
Inventory Work In Process [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			50.00%
Inventory Work In Process [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			100.00%
Equipment [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			30.00%
Equipment [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			70.00%
Marketable Securities [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Loans at fair value	8		8
Subtotal	11		11
Valuation allowance	3		3
Recoveries			39	22
Marketable Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			10.00%
Marketable Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Percentage of discount from appraised value (in hundredths)			30.00%
Impaired Loans [Member]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Subtotal	30,300	47,600	30,300	47,600
Valuation allowance	7,500	14,700	7,500	14,700
Recoveries	$ 200	$ 1,800	$ 2,500	$ 3,500