EARNINGS PER SHARE (Details) (USD $)	0 Months Ended	3 Months Ended					9 Months Ended		12 Months Ended
	Jan. 11, 2010	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Basic income per share
Weighted average basic shares outstanding		11,017,000	10,768,000	10,771,000	10,685,000	10,555,000	11,039,000	10,670,000	10,695,000	10,377,000
Diluted income per share
Effect of stock options (in shares)		419,000		244,000			0	0
Effect of dilutive share awards (in shares)		284,000		370,000			0	0
Weighted average common shares, diluted		11,720,000	11,557,000	11,385,000	10,685,000	10,555,000	11,039,000	10,670,000	10,695,000	10,377,000
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)		0		300,000			700,000	2,100,000	0	0
Value of common stock authorized to be repurchased	$ 10,000,000
Purchase of treasury stock (in shares)		97,726					180,453
Aggregate consideration for shares repurchased		1,800,000					3,321,000
Remaining authorized repurchase amount							$ 800,000