STOCK-BASED COMPENSATION PLANS (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Stock-based compensation plans, additional disclosures
Stock-based compensation expense	$ 1,800,000	$ 1,800,000
Non-vested Stock Awards
Non-vested Stock Awards Outstanding, Number of Shares
Balance at the beginning of the period (in shares)	334
Granted (in shares)	130
Stock awards vested (in shares)	(66)	(74)
Forfeited (in shares)	(7)
Balance at the end of the period (in shares)	391
Non-vested Stock Awards Outstanding, Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 23.26
Granted (in dollars per share)	$ 25.05
Stock awards vested (in dollars per share)	$ 22.81
Forfeited (in dollars per share)	$ 23.48
Balance at the end of the period (in dollars per share)	$ 24.33
Stock Options
Stock Options Outstanding, Number of Shares
Balance at the beginning of the period (in shares)	442
Stock options exercised (in shares)	(72)
Expired (in shares)	(69)
Balance at the end of the period (in shares)	301
Exercisable options at the end of the period (in shares)	301
Stock Options Outstanding, Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 20.41
Stock options exercised (in dollars per share)	$ 11.76
Expired (in dollars per share)	$ 36.65
Balance at the end of the period (in dollars per share)	$ 20.17
Exercisable options at the end of the period (in dollars per share)	$ 20.20
Stock-based compensation plans, additional disclosures
Proceeds from stock option exercises	$ 848,000	$ 2,600,000