EMPLOYEE BENEFIT PLANS (Details Textual)	12 Months Ended
	Dec. 31, 2016 USD ($) age shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Incentive plans and discretionary bonus expense	$ 10,300,000	$ 10,300,000	$ 8,500,000
Employer matching contribution percent	25.00%
Employee contribution percent	6.00%
Nondiscretionary requisite service period	1 year
Defined Contribution Plan, Nondiscretionary Requisite service hours	1000
Nondiscretionary employer contribution, percent up to social security limit	5.00%
Nondiscretionary employer contribution, percent over social security limit	10.00%
Multiemployer Plans [Abstract]
Significance of contributions percentage	5.00%
Defined benefit plan expense	$ 2,000,000	1,600,000	1,500,000
Postretirement Benefits [Abstract]
Retirement age | age	65
Service period to be eligible for postretirement benefit	10 years
Death benefit	$ 5,000
Supplemental Executive Retirement Plans [Abstract]
Plan assets	16,000,000	10,000,000
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Arrangement with Individual, Employer Contribution	142,000	149,000	135,000
Deferred compensation expense	$ 40,000	$ 35,000
Deferred compensation, shares provided for the plan (in shares) | shares	168,352	172,580
Deferred compensation, recorded liability	$ 4,200,000	$ 3,900,000
401(k) Restoration Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	425,000	232,000	56,000
Employee Savings Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	4,800,000	4,500,000	$ 4,200,000
Executive Vice President [Member]
Defined Contribution Plan Disclosure [Line Items]
Supplemental Unemployment Benefit, Salary Continuation Expense	272,000	222,000
Officer [Member]
Defined Contribution Plan Disclosure [Line Items]
Supplemental Unemployment Benefit, Salary Continuation Expense	$ 13,000	$ 11,000