Miscellaneous Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Gain on sales of operating property and equipment	$ 1,516	$ 135	$ 1,597	$ 2,725
Gain/(loss) on foreign currency transactions	1,363	11	1,629	(376)
Rabbi trust investment (loss)/income	(1,504)	(177)	(318)	1,400
Insurance proceeds	0	0	314	756
Contract settlement	0	64	56	2,972
Other, net	(3)	963	1,759	3,729
Total	$ 1,372	$ 996	$ 5,037	$ 11,206