EARNINGS PER SHARE - Factors (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2019	Apr. 01, 2018
Earnings Per Share Basic [Line Items]
Net income	$ 12,763	$ 11,454	$ 31,415	$ 26,509
Weighted average common shares - basic	18,657,719	18,622,083	18,652,289	18,619,006
Weighted average outstanding shares - diluted	18,756,605	18,728,424	18,765,897	18,705,801
Basic earnings per share (in dollars per share)	$ 0.68	$ 0.62	$ 1.68	$ 1.42
Diluted earnings per share (in dollars per share)	$ 0.68	$ 0.61	$ 1.67	$ 1.42
Stock options
Earnings Per Share Basic [Line Items]
Dilutive effect of assumed exercises of stock options and restricted share awards\units	39,160	41,372	47,258	35,770
Restricted stock awards
Earnings Per Share Basic [Line Items]
Dilutive effect of assumed exercises of stock options and restricted share awards\units	59,726	64,969	66,350	51,026