CAPITAL STOCK (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 03, 2016
Exercise of stock options	$ 1,803,000	$ 0
Employee tax withholdings related to the vesting of equity awards	$ 1,330,000	$ 2,455,000
Dividend paid per share to all stockholders of record (in Dollars per Share)	$ 0.175	$ 0.175
Employees surrendered common stock, shares	22,000
Employees surrendered common stock, value	$ 785,000
Preferred stock, shares authorized (in Shares)	5,000,000		5,000,000
Dividend Declared [Member]
Dividends payable (in Description)	Quarterly
Dividends payable, amount per share (in Dollars per Share)	$ 0.175
Dividends payable, date to be paid (Date)	May 18, 2017
Dividends payable, date of record (Date)	May 08, 2017
Common Stock [Member]
Exercise of stock options (in Shares)	93,000
Common stock surrendered by employees in satisfaction of minimum tax withholding associated with equity award vesting (in Shares)	29,000	121,000
Employee tax withholdings related to the vesting of equity awards	$ 1,330,000	$ 2,455,000
Employees surrendered common stock, shares	22,000
Employees surrendered common stock, value	$ 0
Stock repurchased during period, shares	0
Common Stock [Member] | Maximum [Member]
Common stock authorized to repurchase amount				$ 50,000,000
Stock Option [Member]
Exercise of stock options (in Shares)	93,000
Stock Option [Member] | Common Stock [Member]
Exercise of stock options (in Shares)	93,000	0