BENEFIT PLANS - Costs of Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Supplemental Executive Retirement Plan And Supplemental Retirement Income Plan	$ 714	$ 578
Defined Contribution Plan, Cost Recognized	7,920	7,445
Benefit Cost	$ 8,634	$ 8,023