ACCOUNTING POLICIES (Details 9) - USD ($) shares in Thousands	6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	May 05, 2015
Stock repurchase program
Authorized amount under stock repurchase program				$ 25,000,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets, net	$ 68,396,000		$ 56,266,000
Common stock
Stock repurchase program
Purchase of treasury stock (in shares)	604
Purchases of treasury stock	$ 10,000,000
Accounting Standards Update 2015-17
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets, net			$ 16,300,000
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle		$ 9,400,000