PREMISES AND EQUIPMENT (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Premises and equipment
Premises and equipment, gross	$ 105,324,000
Accumulated depreciation and amortization	(18,863,000)
Premises and equipment, net	86,461,000	60,139,000
Depreciation and amortization expense	6,045,000	4,849,000	3,817,000
Reduction in gross premises and equipment and accumulated depreciation and amortization	20,000,000
Land
Premises and equipment
Premises and equipment, gross	10,377,000
Buildings and improvements
Premises and equipment
Premises and equipment, gross	71,402,000
Buildings and improvements | Minimum
Premises and equipment
Estimated Useful Life	5 years
Buildings and improvements | Maximum
Premises and equipment
Estimated Useful Life	39 years
Furniture and equipment
Premises and equipment
Premises and equipment, gross	20,955,000
Furniture and equipment | Minimum
Premises and equipment
Estimated Useful Life	3 years
Furniture and equipment | Maximum
Premises and equipment
Estimated Useful Life	7 years
Construction in process
Premises and equipment
Premises and equipment, gross	2,590,000
Continuing and discontinuing operations
Premises and equipment
Premises and equipment, gross		94,372,000
Accumulated depreciation and amortization		(33,543,000)
Premises and equipment, net		60,829,000
Continuing and discontinuing operations | Land
Premises and equipment
Premises and equipment, gross		8,349,000
Continuing and discontinuing operations | Buildings and improvements
Premises and equipment
Premises and equipment, gross		52,762,000
Continuing and discontinuing operations | Furniture and equipment
Premises and equipment
Premises and equipment, gross		30,886,000
Continuing and discontinuing operations | Construction in process
Premises and equipment
Premises and equipment, gross		$ 2,375,000