SIGNIFICANT ACCOUNTING POLICIES (Recent Accounting Pronouncements) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other (expense) income, net	$ (4,061,000)	$ (996,000)	$ 846,000	$ (299,000)	$ (3,305,000)	$ (432,000)	$ (833,000)	$ (1,549,000)	$ (4,510,000)	$ (6,119,000)	$ 6,195,000
Cumulative effect of change in accounting principle	(1,564,000)				231,000				(1,564,000)	231,000
ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other (expense) income, net	1,400,000
Accumulated Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle	$ (1,564,000)				(450,000)				$ (1,564,000)	(450,000)
Accumulated Earnings | ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle					$ (1,600,000)					$ (1,600,000)
Scenario, Forecast | Minimum | ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets												$ 180,000,000
Operating liabilities												180,000,000
Scenario, Forecast | Maximum | ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets												220,000,000
Operating liabilities												$ 220,000,000