EMPLOYEE BENEFITS (Fair Value of Plan Assets) (Details) (Pension Plan [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	$ 102,800		$ 92,219		$ 75,276
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	61,303		58,185
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	23,089		15,662
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,895		8,763		0
Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	94,287		82,610
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,035		4,489
Corporate Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Corporate Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,035		4,489
Corporate Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Corporate Bonds [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,035		4,489
Redeemable Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	2,254		1,381
Redeemable Preferred Stock [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	2,254		1,381
Redeemable Preferred Stock [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Redeemable Preferred Stock [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Redeemable Preferred Stock [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	2,254		1,381
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,223	[1]	39,481	[1]
Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,223		39,481
Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Equity Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Equity Securities [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,223		39,481
Bond and Mortgage Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,417		5,657
Bond and Mortgage Separate Account Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Bond and Mortgage Separate Account Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,417		5,657
Bond and Mortgage Separate Account Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Bond and Mortgage Separate Account Fund [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,417		5,657
U.S. Property Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,895		8,763
U.S. Property Separate Account Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
U.S. Property Separate Account Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
U.S. Property Separate Account Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,895		8,763
U.S. Property Separate Account Fund [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	9,895		8,763
Arbitrage Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,637		5,516
Arbitrage Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Arbitrage Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,637		5,516
Arbitrage Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Arbitrage Fund [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,637		5,516
Money Market Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	826		17,323
Money Market Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Money Market Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0		0
Money Market Funds [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	$ 826		$ 17,323

[1] Cash and cash equivalents balance as a percent of total plan assets exceeded the target allocation in 2013 as we were in the process of reducing the number of external investment managers and moving funds between managers in early 2014.