Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity [Abstract]
Cumulative translation adjustment, Pre-tax	$ 23,743	$ 13,874	$ (32,894)	$ 14,158
Cumulative translation adjustment, Tax	0	0	0	0
Cumulative translation adjustment, Net of Tax	23,743	13,874	(32,894)	14,158
Pension and Other Postretirement Adjustments
Pension and other postretirement adjustments, Pre-tax	1,215	798	2,390	1,477
Pension and other postretirement adjustments, Tax	(395)	(281)	(790)	(521)
Pension and other postretirement adjustments, Net of Tax	820	517	1,600	956
Reclassification adjustments for derivatives, Pre-tax	1,767	1,817	3,539	3,637
Reclassification adjustments for derivatives, Tax	(641)	(662)	(1,283)	(1,325)
Reclassification adjustments for derivatives, Net of tax	1,126	1,155	2,256	2,312
Total other comprehensive income (loss), Pre-tax	26,725	16,489	(26,965)	19,272
Total other comprehensive income (loss), Tax	(1,036)	(943)	(2,073)	(1,846)
Other comprehensive income (loss)	$ 25,689	$ 15,546	$ (29,038)	$ 17,426