TREASURY STOCK (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2015
Treasury Stock
Stock repurchased (in shares)	134,049
Stock repurchased amount	$ 7,136,494
Average price per share of stock repurchased	$ 53.24
$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	$ 4,500,000