TREASURY STOCK (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2015
Treasury Stock
Stock repurchased (in shares)	104,098
Stock repurchased amount	$ 5,512,960
Average price per share of stock repurchased	$ 52.96
$10 Million Repurchase Program
Treasury Stock
Stock repurchase program authorized amount			$ 10,000,000
New $10 Million Repurchase Program
Treasury Stock
Stock repurchase program authorized amount		$ 10,000,000
Stock repurchased amount	$ 2,900,000