TREASURY STOCK (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 29, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, authorized amount		$ 10,000,000		$ 10,000,000
Costs of shares repurchased	$ 2,927,556
Treasury Stock, Value	18,225,862		$ 15,298,306
New Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, authorized amount	$ 10,000,000
Number of shares repurchased	56,243
Average price per share	$ 52.05
Treasury Stock, Value	$ 2,900,000
Amount of treasury shares retired	$ 331,000