EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income		$ 6,456	$ 6,451	$ 19,260	$ 18,482
Dividends and undistributed earnings allocated to participating securities	[1]	(21)	(20)	(61)	(57)
Net income available to common shareholders		$ 6,435	$ 6,431	$ 19,199	$ 18,425
Weighted-average common shares outstanding for basic EPS		7,453,222	7,421,592	7,443,543	7,459,972
Dilutive effect of stock-based awards (shares)	[2]	23,817	18,356	20,941	19,355
Weighted-average common and potential common shares for diluted EPS (shares)		7,477,039	7,439,948	7,464,484	7,479,327
Basic EPS (in dollars per share)		$ 0.86	$ 0.87	$ 2.58	$ 2.47
Diluted EPS (in dollars per share)		$ 0.86	$ 0.86	$ 2.57	$ 2.46
Employee Stock Option
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Stock options (shares)	[3]	13,750	30,750	16,250	14,750

[1] Represents dividends paid and undistributed earnings allocated to nonvested stock-based awards that contain non-forfeitable rights to dividends.

[2] Represents the effect of the assumed exercise of stock options, vesting of restricted shares, vesting of restricted stock units, and vesting of LTIP awards that have met the performance criteria, as applicable, utilizing the treasury stock method.

[3] Represents stock-based awards not included in the computation of potential common shares for purposes of calculating diluted EPS as the exercise prices were greater than the average market price of the Company's common stock.