EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
EARNINGS PER SHARE
Net income	$ 10,295	$ 10,204	$ 14,267	$ 137,309	$ 12,410	$ 10,721	$ 10,812	$ 13,478	$ 172,075	$ 47,421	$ 36,571
Preferred stock dividends, accretion of discount and conversion of preferred stock to common stock											(83,897)
Net income available to common shareholders									$ 172,075	$ 47,421	$ 120,468
Weighted average shares outstanding - basic									41,961,000	41,720,000	35,891,000
SHARE-BASED COMPENSATION
Dilutive effect of Treasury warrants (in shares)									14,000	22,000	20,000
Weighted average shares outstanding - diluted									42,317,000	42,084,000	36,342,000
Basic earnings per share (in dollars per share)	$ 0.24	$ 0.24	$ 0.34	$ 3.28	$ 0.30	$ 0.26	$ 0.26	$ 0.32	$ 4.10	$ 1.14	$ 3.36
Diluted earnings per share (in dollars per share)	$ 0.24	$ 0.24	$ 0.34	$ 3.25	$ 0.29	$ 0.26	$ 0.26	$ 0.32	$ 4.07	$ 1.13	$ 3.31
Antidilutive securities excluded from the dilutive share calculation (in shares)									24,526	316,188	40,166
Employee stock options and awards
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements									341,000	278,000	415,000
Deferred salary restricted stock units
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements									1,000	64,000	16,000