STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE
Common stock, shares outstanding	143,367,652		137,630,896
Earnings per share calculations
Net income	$ 76,741	$ 72,091
Less: Preferred stock dividends		(1,714)
Less: Earnings allocated to participating securities	(166)	(584)
Basic EPS - income allocated to common stockholders	76,575	69,793
Effect of dilutive securities:
Restricted stock units	80	36
Convertible preferred stock		1,714
Diluted EPS - income allocated to common stockholders	$ 76,655	$ 71,543
Number of Shares
Weighted average shares outstanding	141,962,000	137,648,000
Effect of dilutive securities on weighted average shares outstanding
Stock options (in shares)	79,000	51,000
Restricted stock units (in shares)	447,000	242,000
Warrants (in shares)	144,000
Convertible preferred stock (in shares)		5,578,000
Total weighted average diluted shares outstanding	142,632,000	143,519,000
Per Share Amounts
Basic EPS - income allocated to common stockholders (in dollars per share)	$ 0.54	$ 0.51
Diluted EPS - Income available to common stockholders (in dollars per share)	$ 0.54	$ 0.50