Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Non-controlling Interest [Member]
Beginning Balance at Dec. 31, 2014	$ 172,989
Net income (loss)	(6,788)
Foreign currency translation gain	(25,011)
Ending Balance at Dec. 31, 2015	312,020
Net income (loss)	7,299
Foreign currency translation gain	(9,727)
Ending Balance at Dec. 31, 2016	310,513	$ 272	$ 284,508	$ 55,509	$ (29,808)	$ 32
Ending Balance, Shares at Dec. 31, 2016		27,249
Net income (loss)	7,407
Foreign currency translation gain	5,004
Ending Balance at Mar. 31, 2017	323,491
Beginning Balance at Dec. 31, 2016	310,513	$ 272	284,508	55,509	(29,808)	32
Beginning Balance, Shares at Dec. 31, 2016		27,249
Net income (loss)	(14,122)			(14,122)
Dividends paid	(3,960)			(3,960)
Stock option expense	575		575
Shares issued for option exercises	$ 2,592	$ 2	2,590
Shares issued for option exercises, shares	220	220
Restricted and performance based stock compensation expense	$ 1,644	$ 1	1,643
Restricted and performance based stock compensation expense, shares		85
Restricted shares forgiven for taxes and forfeited	(413)		(413)
Restricted shares forgiven for taxes and forfeited, shares		(17)
Foreign currency translation gain	14,244				14,244
Adoption of new accounting standard (see Note 1)	740			740
Ending Balance at Jun. 30, 2017	311,813	$ 275	288,903	38,167	(15,564)	32
Ending Balance, Shares at Jun. 30, 2017		27,537
Beginning Balance at Mar. 31, 2017	323,491
Net income (loss)	(21,529)
Foreign currency translation gain	9,240
Ending Balance at Jun. 30, 2017	$ 311,813	$ 275	$ 288,903	$ 38,167	$ (15,564)	$ 32
Ending Balance, Shares at Jun. 30, 2017		27,537