Interim Condensed Consolidated Statements of Stockholders' Equity - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2014	$ 337,670	$ 1,130	$ 93,849	$ (426)	$ 259,476	$ (16,359)
Balance (shares) at Dec. 31, 2014		11,264
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,825	$ 0	0	0	31,825	0
Translation adjustment	(16,012)	0	0	0	0	(16,012)
Net actuarial gain arising during period	566	0	0	0	0	566
Stock-based compensation	762	0	762	0	0	0
Exercise of stock options	2,008	$ 9	1,999	0	0	0
Exercise of stock options (shares)		85
Dividends paid ($.24 per share)	(2,719)	$ 0	0	0	(2,719)	0
Balance at Sep. 30, 2015	$ 354,100	$ 1,139	$ 96,610	$ (426)	$ 288,582	$ (31,805)
Balance (shares) at Sep. 30, 2015		11,349