EMPLOYEE BENEFITS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Plan's funded status and amounts recognized in the Consolidated Statements Of Condition [Abstract]
Optional required contribution for pension plan		$ 1,000	$ 1,000
Minimum required contribution for pension plan		0	0
Additional minimum required contribution for the pension plan	$ 0	0
Qualified Pension Plan [Member]
Plan's change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	47,431	49,734	41,713
Interest cost	2,185	2,099	2,158
Actuarial loss (gain)	1,895	(2,451)	7,709
Benefits paid	(2,133)	(1,951)	(1,846)
Benefit obligation at end of year	49,378	47,431	49,734
Plan's change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	41,003	43,431	41,456
Actual return on plan assets	2,919	(1,227)	2,992
Employer contribution	0	1,000	1,000
Benefits paid and actual expenses	(2,541)	(2,201)	(2,017)
Fair value of plan assets at end of year	41,381	41,003	43,431
Plan's funded status and amounts recognized in the Consolidated Statements Of Condition [Abstract]
Underfunded status	(7,997)	(6,428)
Amounts included in other liabilities	(7,997)	(6,428)
Accumulated benefit obligation	49,378	47,431
Estimated benefits to be paid during the years [Abstract]
2017	2,322
2018	2,413
2019	2,502
2020	2,540
2021	2,656
2022-2026	14,120
Net periodic pension cost [Abstract]
Interest cost on projected benefit obligation	2,185	2,099	2,158
Expected return on plan assets	(2,497)	(2,792)	(2,548)
Amortization of net loss	299	249	25
Net periodic pension credit	(13)	(444)	(365)
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Net actuarial loss	1,880	1,819	7,435
Amortization of net loss	(299)	(249)	(25)
Total recognized in other comprehensive income	1,581	1,570	7,410
Total recognized in net periodic pension credit and other comprehensive income	$ 1,568	$ 1,126	$ 7,045
Weighted-average discount rate for the period	4.74%	4.32%	5.33%
Expected long-term rate of return on assets	7.00%	7.00%	7.00%
Assumptions Used in Calculations [Abstract]
Discount rate	4.58%	4.74%
Rate of increase in future compensation	0.00%	0.00%
Expected net periodic pension cost [Abstract]
Interest cost on projected benefit obligation	$ 2,190
Expected return on plan assets	(2,373)
Amortization of net loss	356
Net periodic pension cost	$ 173
Weighted-average discount rate for the period	4.58%
Expected long-term rate of return on assets	7.00%
Pension plan weighted-average asset allocations	100.00%	100.00%
Qualified Pension Plan [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	$ 41,381	$ 41,003
Qualified Pension Plan [Member] | Short-term Investment Funds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	181	323
Qualified Pension Plan [Member] | U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	9,698	9,200
Qualified Pension Plan [Member] | Non U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	15,382	15,000
Qualified Pension Plan [Member] | U.S. Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	16,120	16,480
Qualified Pension Plan [Member] | Active Markets for Identical Assets Quoted Prices (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	181	323
Qualified Pension Plan [Member] | Active Markets for Identical Assets Quoted Prices (Level 1) [Member] | Short-term Investment Funds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	181	323
Qualified Pension Plan [Member] | Active Markets for Identical Assets Quoted Prices (Level 1) [Member] | U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	0	0
Qualified Pension Plan [Member] | Active Markets for Identical Assets Quoted Prices (Level 1) [Member] | Non U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	0	0
Qualified Pension Plan [Member] | Active Markets for Identical Assets Quoted Prices (Level 1) [Member] | U.S. Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	0	0
Qualified Pension Plan [Member] | Significant other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	41,200	40,680
Qualified Pension Plan [Member] | Significant other Observable Inputs (Level 2) [Member] | Short-term Investment Funds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	0	0
Qualified Pension Plan [Member] | Significant other Observable Inputs (Level 2) [Member] | U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	9,698	9,200
Qualified Pension Plan [Member] | Significant other Observable Inputs (Level 2) [Member] | Non U.S. Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	15,382	15,000
Qualified Pension Plan [Member] | Significant other Observable Inputs (Level 2) [Member] | U.S. Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Measurements of Pension Plan Assets [Abstract]
Fair value of plan assets	$ 16,120	$ 16,480
Qualified Pension Plan [Member] | Cash [Member]
Expected net periodic pension cost [Abstract]
Pension plan weighted-average asset allocations	0.00%	1.00%
Qualified Pension Plan [Member] | Cash Equivalents [Member]
Target Allocation [Abstract]
Target Allocations, Minimum	0.00%
Target Allocations, Maximum	5.00%
Qualified Pension Plan [Member] | Equity Securities [Member]
Expected net periodic pension cost [Abstract]
Pension plan weighted-average asset allocations	61.00%	59.00%
Target Allocation [Abstract]
Target Allocations, Minimum	54.00%
Target Allocations, Maximum	64.00%
Qualified Pension Plan [Member] | Debt Securities [Member]
Expected net periodic pension cost [Abstract]
Pension plan weighted-average asset allocations	39.00%	40.00%
Qualified Pension Plan [Member] | Fixed Income Securities [Member]
Target Allocation [Abstract]
Target Allocations, Minimum	36.00%
Target Allocations, Maximum	41.00%