Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment, tax (benefit)	$ 225	$ 125	$ (1,384)	$ 250
Derivative financial instruments adjustment, tax (benefit)	(591)	50	(990)	167
Amortization of prior service costs and net gains or losses, tax	$ 1,462	$ 997	$ 2,924	$ 1,994