STOCK-BASED COMPENSATION (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2012
Unvested Performance Shares [Rollforward]
Unvested, beginning of period (in shares)	67,500
Granted (in shares)	79,569
Vested (in shares)	(55,319)
Unvested, end of period (in shares)	91,750
Weighted average fair value per share, beginning of period (in dollars per share)	$ 19.78
Weighted average fair value per share, granted (in dollars per share)	$ 22.60
Weighted average fair value, vested (in dollars per share)	$ 21.45
Weighted average fair value, end of period (in dollars per share)	$ 21.45
To Settle in Cash [Member]
Unvested Performance Shares [Rollforward]
Shares outstanding at January 1, 2012, performance shares (in shares)	267,736
Granted, performance shares (in shares)	79,569
Paid/Issued, performance shares (in shares)	(101,722)
Canceled, performance shares (in shares)	(416)
Shares outstanding at December 31, 2012, performance shares (in shares)	245,167
Total vested, at December 31, 2012, performance shares (in shares)	153,417
Weighted average fair value, outstanding, at January 1, 2012, performance shares (in dollars per share)	$ 19.78
Weighted average fair value, granted, performance shares (in dollars per share)	$ 22.60
Weighted average fair value, paid/issued, performance shares (in dollars per share)	$ 19.78
Weighted average fair value, canceled, performance shares (in dollars per share)	$ 19.78
Weighted average fair value, outstanding, at December 31, 2012, performance shares (in dollars per share)	$ 21.45
Weighted average fair value, total vested, at December 31, 2012, performance shares (in dollars per share)	$ 21.45
To Settle in Shares [Member]
Unvested Performance Shares [Rollforward]
Shares outstanding at January 1, 2012, performance shares (in shares)	254,125
Granted, performance shares (in shares)	81,625
Paid/Issued, performance shares (in shares)	(93,500)
Canceled, performance shares (in shares)	0
Shares outstanding at December 31, 2012, performance shares (in shares)	242,250
Total vested, at December 31, 2012, performance shares (in shares)	150,500
Weighted average fair value, outstanding, at January 1, 2012, performance shares (in dollars per share)	$ 15.83
Weighted average fair value, granted, performance shares (in dollars per share)	$ 24.11
Weighted average fair value, paid/issued, performance shares (in dollars per share)	$ 14.28
Weighted average fair value, canceled, performance shares (in dollars per share)	$ 0.00
Weighted average fair value, outstanding, at December 31, 2012, performance shares (in dollars per share)	$ 19.22
Weighted average fair value, total vested, at December 31, 2012, performance shares (in dollars per share)	$ 18.03