EMPLOYEE BENEFIT PLANS (Details Textual)	12 Months Ended
	Dec. 31, 2015 USD ($) age shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Incentive plans and discretionary bonus expense	$ 10,300,000	$ 8,500,000	$ 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	$ 1,600,000	1,500,000	1,400,000
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	10,000,000	8,400,000
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Arrangement with Individual, Employer Contribution	149,000	$ 135,000	107,000
Deferred compensation expense	$ 35,000
Deferred compensation, shares provided for the plan (in shares) | shares	172,580	176,849
Deferred compensation, recorded liability	$ 3,900,000	$ 3,700,000
401(k) Restoration Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	232,000	56,000
Employee Savings Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	4,500,000	$ 4,200,000	$ 3,900,000
Executive Vice President [Member]
Defined Contribution Plan Disclosure [Line Items]
Supplemental Unemployment Benefit, Salary Continuation Expense	222,000
Officer [Member]
Defined Contribution Plan Disclosure [Line Items]
Supplemental Unemployment Benefit, Salary Continuation Expense	$ 11,000