CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS (LOSS) PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income	$ 15,620	$ 6,030	$ 50,194	$ 387	$ 5,457
Preferred stock dividend accrual	1,227	1,550	4,327	4,650	6,200
Preferred stock discount accretion	1,216	425	2,124	1,276
Gain on repurchase and retirement of preferred stock	(2,070)	0	(2,070)	0
NET INCOME (LOSS) AVAILABLE TO COMMON SHAREHOLDERS	$ 15,247	$ 4,055	$ 45,813	$ (5,539)
Basic weighted average shares outstanding	19,172	16,809	18,428	16,540
Plus unvested restricted stock	113	28	61	29
Diluted weighted shares outstanding	19,285	16,837	18,489	16,569
Earnings (loss) per common share
Basic (in dollars per share)	$ 0.80	$ 0.24	$ 2.49	$ (0.33)
Diluted (in dollars per share)	$ 0.79	$ 0.24	$ 2.48	$ (0.33)