RECENT ACCOUNTING PRONOUNCEMENTS (Details) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) $ / shares	Mar. 31, 2016 USD ($) $ / shares	[3],[4]
Accounting Changes and Error Corrections [Abstract]
Net income(1) | $		$ 10,076	$ 8,646	[1],[2]
Basic earnings per share (in dollars per share)	[1],[5]	$ 0.65	$ 0.56
Diluted earnings per share (in dollars per share)	[1],[5]	$ 0.64	$ 0.56
Stock split conversion ratio		1.5

[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.