EMPLOYEE BENEFITS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Non-Qualified Plans [Abstract]
Cumulative-effect adjustment to retained earnings, net of tax amount	$ 1,300,000
Cumulative-effect adjustment to retained earnings, before tax amount	1,600,000
Cumulative-effect adjustment to retained earnings, tax amount	340,000
Stock Appreciation Rights [Member]
Non-Qualified Plans [Abstract]
Fair value in excess of recorded intrinsic value		$ 1,600,000
Stock Appreciation Rights [Member] | Nonqualified Plans [Member]
Non-Qualified Plans [Abstract]
Liabilities for cost of benefits accrued		10,600,000
Fair value in excess of recorded intrinsic value		$ 1,600,000
Cumulative-effect adjustment to retained earnings, net of tax amount	1,300,000
Cumulative-effect adjustment to retained earnings, before tax amount	1,600,000
Cumulative-effect adjustment to retained earnings, tax amount	340,000
Employee benefits expense	$ 607,000