EQUITY (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation plans
Pretax stock-based compensation expense	$ 656,000	$ 501,000
Unrecognized share-based compensation
Unrecognized compensation costs	5,900,000
Weighted-average period of recognition	1 year 7 months 6 days
Restricted stock
Stock-based compensation plans
Pretax stock-based compensation expense	456,000	325,000
Number of shares
Non-vested shares outstanding at the beginning of the period	64,318
Shares granted	168,516
Non-vested shares outstanding at the end of the period	232,834
Price
Non-vested shares outstanding at the beginning of the period (in dollars per share)	$ 18.33
Shares granted (in dollars per share)	$ 17.13
Performance shares
Stock-based compensation plans
Pretax stock-based compensation expense	$ 200,000	$ 176,000
Number of shares
Non-vested shares outstanding at the beginning of the period	58,221
Shares granted	66,504
Non-vested shares outstanding at the end of the period	124,725
Price
Non-vested shares outstanding at the beginning of the period (in dollars per share)	$ 18.85
Shares granted (in dollars per share)	$ 19.30