Consolidated Statements of Operations and Comprehensive Income (Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Accumulated other comprehensive income	$ 0	$ 1,192	$ 2,578	$ 5,161
Income tax expense (benefit) from reclassification items	$ 0	$ 0	$ 0	$ 0