EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share) (Details) $ / shares in Units, $ in Thousands		3 Months Ended					9 Months Ended
		Sep. 30, 2016 USD ($) $ / shares shares		Mar. 31, 2016 USD ($) $ / shares	Sep. 30, 2015 USD ($) $ / shares shares		Sep. 30, 2016 USD ($) $ / shares shares		Sep. 30, 2015 USD ($) $ / shares shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income | $		$ 10,903		$ 8,646	$ 6,456		$ 29,165		$ 19,260
Dividends and undistributed earnings allocated to participating securities | $	[1]	(54)			(21)		(134)		(61)
Net income available to common shareholders | $		$ 10,849			$ 6,435		$ 29,031		$ 19,199
Weighted-average common shares outstanding for basic EPS(2)	[2]	15,425,452			11,179,821		15,410,310		11,165,297
Dilutive effect of stock-based awards (shares)	[4]	82,109	[3]		36,023	[2]	73,010	[2]	31,452	[2]
Weighted-average common and potential common shares for diluted EPS (shares)		15,507,561			11,215,844		15,483,320		11,196,749
Basic EPS (in dollars per share) | $ / shares		$ 0.70		$ 0.56	$ 0.58		$ 1.88		$ 1.72
Diluted EPS (in dollars per share) | $ / shares		$ 0.70		$ 0.56	$ 0.57		$ 1.88		$ 1.71
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)	[5]	0			20,625		18,375		24,375

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

[2] (2) Share and per share amounts have been adjusted to reflect the three-for-two stock split effective September 30, 2016, for all periods presented. Refer to Note 2.

[3] (1) Share and per share amounts have been adjusted to reflect the three-for-two stock split effective September 30, 2016, for all periods presented. Refer to Note 2.

[4] 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.

[5] 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.