PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and fixed assets, gross	$ 55,180	$ 47,126
Less: accumulated depreciation and amortization	(30,854)	(28,721)
Premises and fixed assets, net	24,326	18,405
Premises held for sale	0	1,379	[1]
Depreciation and amortization expense	3,310	2,223		$ 2,604
Premises held for sale with aggregate recorded balance	0	1,379		8,799
Proceeds from the sales of premises and fixed assets	11,791	75,899		0
Gain on sale of real estate	10,412	68,183		$ 0
Land [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and fixed assets, gross	1,600	1,600
Buildings [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and fixed assets, gross	10,828	11,972
Leasehold Improvements [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and fixed assets, gross	22,657	18,590
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and fixed assets, gross	$ 20,095	$ 14,964

[1] At December 31, 2016 the Company had executed a contract of sale on real estate with a net book value of $1,379.