ACQUISITIONS (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Unaudited pro forma information
Pro forma net interest income	$ 105,183	$ 84,869
Pro forma non-interest income	45,205	40,919
Pro forma net income	$ 24,443	$ 9,292
Pro forma earnings per share from continuing operations
Basic (in dollars per share)	$ 1.16	$ 0.52
Diluted (in dollars per share)	$ 1.16	$ 0.52