PREMISES AND EQUIPMENT, NET (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
PREMISES AND EQUIPMENT, NET
Premises and equipment, gross	$ 76,651,000	$ 59,873,000
Less: accumulated depreciation and amortization	(44,216,000)	(40,370,000)
Premises and equipment, net	32,435,000	19,503,000
Depreciation and amortization expense	6,000,000	5,400,000	5,400,000
Estimated Lease Payments
2014	17,279,000
2015	15,055,000
2016	12,317,000
2017	9,824,000
2018	7,461,000
Thereafter	12,449,000
Total	74,385,000
Gross rental expense	17,600,000	16,800,000	16,700,000
Total rental income	750,000	505,000	587,000
Future minimum rental payments to be received under noncancelable subleases	2,600,000
Land
PREMISES AND EQUIPMENT, NET
Premises and equipment, gross	6,755,000	2,027,000
Buildings
PREMISES AND EQUIPMENT, NET
Premises and equipment, gross	12,725,000	5,578,000
Furniture, fixtures and equipment
PREMISES AND EQUIPMENT, NET
Premises and equipment, gross	31,080,000	28,272,000
Leasehold improvements
PREMISES AND EQUIPMENT, NET
Premises and equipment, gross	$ 26,091,000	$ 23,996,000