Consolidated Condensed Statement of Changes In Shareholders' Equity - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings
Beginning Balance at Dec. 31, 2016	$ 460,405	$ 262,251	$ 10,323	$ (69,091)	$ 256,922
Beginning Balance (in shares) at Dec. 31, 2016	36,534,464	36,534,000
Cumulative effect of accounting change due to adoption of ASU 2016-09	$ 1,496				1,496
Stock repurchase	(5,326)	$ (5,326)
Stock repurchase (in shares)		(164,000)
Exercise of Common Stock options for cash	2,434	$ 3,237	(803)
Exercise of Common Stock options for cash (in shares)		187,000
Cancellation of restricted stock	(1,100)	$ (1,100)
Cancellation of restricted stock (in shares)		(32,000)
Stock option compensation	4,686		4,686
Common Stock issued to Board of Directors and employees	3,873	$ 3,873
Common Stock issued to Board of Directors and employees (in shares)		153,000
Currency translation, net	41,893			41,893
Foreign currency hedge, net	1,858			1,858
Commodity hedge, net	117			117
Net income	40,469				40,469
Ending Balance at Sep. 30, 2017	$ 550,805	$ 262,935	$ 14,206	$ (25,223)	$ 298,887
Ending Balance (in shares) at Sep. 30, 2017	36,677,528	36,678,000