STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Summary of Stock-based Compensation Plans
Total compensation expense, before taxes		$ 2,500,000
Total compensation expense, net income		1,500,000
Net tax benefit recognized in equity for stock compensation plans	3,708,000	2,602,000
Incentive shares available to be issued	3,711,650
Restricted Stock Awards
Summary of Stock-based Compensation Plans
Total compensation expense, before taxes	3,200,000
Total compensation expense, net income	1,800,000
Stock Options
Summary of Stock-based Compensation Plans
Cash proceeds from stock option exercises	$ 283,000	$ 442,000