EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share) (Details) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	[4]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income(1) | $		$ 10,076	$ 8,646	[1],[2],[3]
Dividends and undistributed earnings allocated to participating securities | $	[5]	(45)	(32)
Net income available to common shareholders | $		$ 10,031	$ 8,614
Weighted-average common shares outstanding for basic EPS		15,488,848	15,389,990	[3]
Dilutive effect of stock-based awards (shares)	[6]	79,791	69,595
Weighted-average common and potential common shares for diluted EPS (shares)		15,568,639	15,459,585	[3]
Basic EPS (in dollars per share) | $ / shares	[1],[5]	$ 0.65	$ 0.56	[3]
Diluted EPS (in dollars per share) | $ / shares	[1],[5]	$ 0.64	$ 0.56	[3]
Stock split conversion ratio		1.5
Employee Stock Option
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Stock options (shares)	[7]	0	19,875

[1] (1) The financial information for the three months ended March 31, 2016 has been adjusted to reflect the adoption of ASU 2016-09.

[2] (1)The consolidated statement of cash flows for the three months ended March 31, 2016 has been adjusted to reflect the adoption of ASU 2016-09 in the second quarter of 2016 effective as of January 1, 2016.

[3] (1)The consolidated statement of income for the three months ended March 31, 2016 has been adjusted to reflect the adoption of Accounting Standards Updates No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09") in the second quarter of 2016 effective as of January 1, 2016.

[4] (5) Share and per share amounts for the three months ended March 31, 2016 have been adjusted to reflect the three-for-two stock split effective September 30, 2016.

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

[6] 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.

[7] 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 and are considered anti-dilutive.