QUARTERLY FINANCIAL DATA (UNAUDITED) - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
QUARTERLY FINANCIAL DATA (UNAUDITED)
Securities gross losses realized			$ (7,900)		$ (7,921)	$ 38	$ 449
Fraudulent conduct of a business customer		$ 9,500			8,900
Office Relocation Costs	$ 800				$ 750
Pre-tax recovery related to fruad loss	$ 600
Allowance for loan and specific reserves charge-offs				$ 8,000
Restructuring costs						$ 8,020
Write down deferred tax assets				$ 7,600