Components of Income (Loss) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) from continuing operations before income taxes:
Income (loss) from continuing operations before income taxes	$ 32,522	$ 46,022	$ (17,915)
CANADA
Income (loss) from continuing operations before income taxes:
Foreign	(1,872)	(1,674)	(20,212)
UNITED STATES
Income (loss) from continuing operations before income taxes:
U.S.	20,422	23,298	(9,661)
Other Countries
Income (loss) from continuing operations before income taxes:
Foreign	$ 13,972	$ 24,398	$ 11,958