Estimated average period over which an employee is required to provide service in exchange for the unfunded noncontributory defined benefit plan, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

EMPLOYEE BENEFITS (Details) $ in Thousands	1 Months Ended	12 Months Ended
EMPLOYEE BENEFITS (Details) $ in Thousands	Jan. 31, 2004 payment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2012 USD ($)
EMPLOYEE BENEFITS
Matching employer contributions under 401(k) Savings and Retirement plan		$ 6,700	$ 6,600	$ 6,200
Supplemental Executive Retirement Plan (SERP)
Number of annual payments upon retirement \| payment	15
Average remaining service period		12 years 6 months	9 years 7 months 6 days
Change in Benefit Obligation
Benefit obligation at the beginning of the year		$ 21,885	$ 23,054
Service cost		390	386
Interest cost		740	703
Payments		(1,847)	(1,853)
Actuarial loss (gain)		136	(405)
Benefit obligation at the end of the year		$ 21,304	$ 21,885	$ 23,054
Unfunded status						$ 21,304
Net amount recognized						21,304
Amounts Recognized in the Consolidated Balance Sheet
Current accrued expenses and other current liabilities						1,913	$ 1,847
Non-current other liabilities						19,391	20,038
Total accrued liabilities						21,304	21,885
Other comprehensive (loss) income - gross actuarial gains (losses)						$ (100)	$ 400		$ (1,400)
Weighted average assumptions used to determine the benefit obligation and net benefit cost
Discount rate, to determine the benefit obligation (as a percent)					4.03%	3.54%	3.64%	3.34%
Discount rate, to determine net benefit cost (as a percent)		3.54%	3.64%	3.34%	4.03%
Average rate of increase in compensation, to determine the benefit obligation (as a percent)					3.00%	3.00%	3.00%	3.00%
Average rate of increase in compensation, to determine net benefit cost (as a percent)		3.00%	3.00%	3.00%	3.00%
Future payments under the Plan
2017						$ 1,913
2018						1,913
2019						1,913
2020						1,913
2021						1,913
Thereafter						11,739
Total		$ 21,885	$ 23,054	$ 23,054		21,304	$ 21,885	$ 23,054
Estimated accumulated obligation benefit						2,000	1,400
Funded estimated accumulated obligation benefit						1,400	800
Unfunded estimated accumulated obligation benefit						$ 600	$ 600