STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014
EPS calculations
Net income	$ 98,748	$ 84,305	[1]	$ 198,775	$ 158,476	[1]
Less: Earnings allocated to participating securities		(120)		(3)	(283)
Basic EPS - income allocated to common stockholders	98,748	84,185	[1]	198,772	158,193	[1]
Effect of dilutive securities:
Restricted stock units	93	51		197	129
Diluted EPS - income allocated to common stockholders	$ 98,841	$ 84,236	[1]	$ 198,969	$ 158,322	[1]
Number of Shares
Total weighted average basic shares outstanding	143,846	143,187		143,751	142,578
Effect of dilutive securities on weighted average shares outstanding
Stock options (in shares)	1	75		4	77
Restricted stock units (in shares)	470	284		494	359
Warrants (in shares)	163	143		159	144
Total weighted average diluted shares outstanding	144,480	143,689		144,408	143,158
Earnings per share available to common stockholders
Basic EPS - income allocated to common stockholders (in dollars per share)	$ 0.69	$ 0.59	[1]	$ 1.38	$ 1.11	[1]
Diluted EPS - income allocated to common stockholders (in dollars per share)	$ 0.68	$ 0.59	[1]	$ 1.38	$ 1.11	[1]

[1] Prior periods were restated to reflect the retrospective application of adopting the new accounting guidance related to the Company's investments in qualified affordable housing projects Accounting Standards Update ("ASU") 2014-01. See Note 10 of the Notes to Consolidated Financial Statements for additional information.