ORGANIZATION AND ACCOUNTING POLICIES (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ORGANIZATION AND ACCOUNTING POLICIES
Weighted average shares outstanding - basic	72,390,584	71,376,046	70,830,855
Incremental shares issuable from dilutive stock options	155,625	720,626	1,216,633
Weighted average shares outstanding - diluted	72,546,209	72,096,672	72,047,488
Employee stock options
Antidilutive securities
Anti-dilutive securities (in shares)	891,405	575,750	918,416
Convertible debentures
Antidilutive securities
Anti-dilutive securities (in shares)	32,720	32,720	47,170
Percentage of principal amount at which debentures may be converted from the date of issuance until maturity into common stock	100.00%	100.00%	100.00%
Conversion price (in dollars per share)	$ 50.00	$ 50.00
Convertible debentures | Minimum
Antidilutive securities
Conversion price (in dollars per share)		$ 35.00	$ 35.00
Convertible debentures | Maximum
Antidilutive securities
Conversion price (in dollars per share)		$ 50.00	$ 50.00
Preferred stock
Antidilutive securities
Anti-dilutive securities (in shares)	5,352	5,352	5,352
Percentage of redemption price amount from the date of issuance until redemption that may be converted	100.00%
Preferred stock | Minimum
Antidilutive securities
Conversion rate (in shares)	0.5
Preferred stock | Maximum
Antidilutive securities
Conversion rate (in shares)	1
Restricted Stock
Antidilutive securities
Anti-dilutive securities (in shares)	1,898,133	1,606,460	615,731