Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2011

Other Comprehensive Loss [Abstract]

Change in accumulated other comprehensive loss

	Three Months Ended
	June 30,
	2011			2010
Accumulated other comprehensive loss, March 31, 2011 and 2010, respectively	$	(17,845	)	$	(28,695	)
Other comprehensive income (loss):
Foreign currency translation adjustment		711			(2,769	)
Accumulated other comprehensive loss, June 30, 2011 and 2010, respectively	$	(17,134	)	$	(31,464	)

	Six Months Ended
	June 30,
	2011			2010
Accumulated other comprehensive loss, December 31, 2010 and 2009, respectively	$	(25,700	)	$	(18,996	)
Other comprehensive income (loss):
Foreign currency translation adjustment		8,566			(12,468	)
Accumulated other comprehensive loss, June 30, 2011 and 2010, respectively	$	(17,134	)	$	(31,464	)