SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income (Loss) Per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Weighted Average Shares Used in Calculations of Basic and Diluted Net Income Per Share [Abstract]
Basic weighted average shares outstanding (in shares)	269,388,000	264,623,000	260,763,000
Effect of dilution:
Stock options (in shares)	3,532,000	3,247,000	3,026,000
Restricted stock awards (in shares)	3,419,000	2,833,000	2,146,000
Diluted weighted average shares outstanding (in shares)	276,339,000	270,703,000	265,935,000
Stock Options
Antidilutive Securities Excluded from Diluted Weighted Average Shares Outstanding [Abstract]
Antidilutive securities excluded from diluted weighted average shares outstanding (in shares)	1,160,000	1,760,000	1,336,000
Restricted Stock - Performance Criteria Not Yet Satisfied
Antidilutive Securities Excluded from Diluted Weighted Average Shares Outstanding [Abstract]
Antidilutive securities excluded from diluted weighted average shares outstanding (in shares)		45,000
Performance Shares
Antidilutive Securities Excluded from Diluted Weighted Average Shares Outstanding [Abstract]
Antidilutive securities excluded from diluted weighted average shares outstanding (in shares)	1,772,000