INCOME TAXES (Details) (USD $) In Thousands, 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, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal									$ 5,660	$ 3,700	$ 3,340
State									582	603	530
Total current									6,242	4,303	3,870
Deferred:
Federal									(229)	469	347
State									67	(109)	(170)
Total deferred									(162)	360	177
Income tax expense
Income tax expense	1,623	1,614	1,475	1,368	1,326	1,241	1,126	970	6,080	4,663	4,047
Amount
Federal income tax expense computed by applying the statutory rate to income before income taxes									6,479	5,134	4,492
Tax exempt interest									(878)	(896)	(817)
State taxes, net of federal income tax benefit									445	341	262
Other									34	84	110
Income tax expense	1,623	1,614	1,475	1,368	1,326	1,241	1,126	970	6,080	4,663	4,047
Percentage of Pre-tax Earnings
Federal income tax expense computed by applying the statutory rate to income before income taxes (as a percent)									34.00%	34.00%	34.00%
Tax exempt interest (as a percent)									(5.00%)	(6.00%)	(6.00%)
State taxes, net of federal income tax benefit (as a percent)									2.00%	2.00%	2.00%
Other (as a percent)									1.00%	1.00%	1.00%
Income tax expense (as a percent)									32.00%	31.00%	31.00%
Deferred tax assets:
Allowance for loan losses	6,144				4,592				6,144	4,592
Restricted stock awards	777				710				777	710
Purchase accounting fair value adjustments	777				1,168				777	1,168
Net operating loss carryforward	516				617				516	617
Other	276				456				276	456
Total	8,490				7,543				8,490	7,543
Deferred tax liabilities:
Pension and SERP expense	(2,765)				(2,124)				(2,765)	(2,124)
Depreciation	(1,386)				(1,411)				(1,386)	(1,411)
REIT undistributed net income	(657)				(627)				(657)	(627)
Net deferred loan costs and fees	(602)				(440)				(602)	(440)
Other	(281)				(304)				(281)	(304)
Total	(5,691)				(4,906)				(5,691)	(4,906)
Total before other comprehensive income	2,799				2,637				2,799	2,637
Deferred Tax liabilities, Net
Net unrealized gains on securities	(1,803)				(3,774)				(1,803)	(3,774)
Deferred Tax Assets, Net
Net change in pension liability	2,036				2,205				2,036	2,205
Net change in cash flow hedge	70				0				70	0
Net deferred tax asset	$ 3,102				$ 1,068				$ 3,102	$ 1,068