Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (23,217)	$ (35,975)	$ (14,013)
Other comprehensive income (loss):
Change in foreign currency translation adjustment (net of income tax expense (recovery) of $7, ($7) and ($333) for the years ended December 31, 2013, 2012 and 2011, respectively)	(1,938)	77	(818)
Foreign currency translation reclassified from accumulated other comprehensive income (loss) (note 2)	(6,711)
Change in unrealized fair value of derivatives designated as cash flow hedges (net of income tax expense of $146)			373
Other comprehensive income (loss)	(8,649)	77	(445)
Comprehensive loss	$ (31,866)	$ (35,898)	$ (14,458)