REVENUE FROM CONTRACTS WITH CUSTOMERS (Schedule of Noninterest Income by Operating Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Service charges on deposits
Overdraft fees		$ 158	$ 181
Interchange income		264	290
Other		394	360
Wealth management fees	[1]	9,174	8,367
Other	[2]	1,739	1,017
Total other income		11,729	10,215
Banking [Member]
Service charges on deposits
Overdraft fees		158	181
Interchange income		264	290
Other		394	360
Wealth management fees	[1]	0	0
Other	[2]	1,463	796
Total other income		2,279	1,627
Wealth Management Division [Member]
Service charges on deposits
Overdraft fees		0	0
Interchange income		0	0
Other		0	0
Wealth management fees	[1]	9,174	8,367
Other	[2]	276	221
Total other income		$ 9,450	$ 8,588

[1] Includes investment brokerage fees.

[2] All of the other category is outside the scope of ASC 606.