Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2010	$ 78,107	$ 167	$ 51,863	$ 6,675	$ 19,402
Beginning Balance, Shares at Dec. 31, 2010		16,620
Net income	20,937			20,937
Stock option expense	480		480
Shares issued for options	2,382	2	2,380
Shares issued for options, Shares		254
Restricted stock compensation expense	348		348
Restricted Stock compensation expense, Shares		75
Foreign currency translation gain (loss)	(2,578)				(2,578)
Ending Balance at Dec. 31, 2011	99,676	169	55,071	27,612	16,824
Ending Balance, Shares at Dec. 31, 2011		16,949
Net income	24,268			24,268
Stock option expense	1,093		1,093
Shares issued for options	22		22
Shares issued for options, Shares		17
Restricted stock compensation expense	695	1	694
Restricted Stock compensation expense, Shares		78
Foreign currency translation gain (loss)	2,806				2,806
Ending Balance at Dec. 31, 2012	128,560	170	56,880	51,880	19,630
Ending Balance, Shares at Dec. 31, 2012		17,044
Net income	17,178			17,178
Dividends Declared	(3,129)			(3,129)
Stock option expense	1,437		1,437
Shares issued for options	4,013	4	4,009
Shares issued for options, Shares	496	496
Restricted stock compensation expense	802	2	800
Restricted Stock compensation expense, Shares		90
Foreign currency translation gain (loss)	3,899				3,899
Ending Balance at Dec. 31, 2013	$ 152,760	$ 176	$ 63,126	$ 65,929	$ 23,529
Ending Balance, Shares at Dec. 31, 2013		17,630