Comprehensive Income (Accumulated Other Comprehensive income (loss)) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated other comprehensive income (loss) [Roll Forward]
Accumulated other comprehensive income (loss)				$ (53,894)
Income tax (benefit)		$ (2,649)	$ (4,461)	(2,724)	$ (11,109)
Accumulated other comprehensive income (loss)		(51,817)		(51,817)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Accumulated other comprehensive income (loss)				(53,894)	(39,822)
Other comprehensive income (loss) before reclassifications				1,069	(10,897)
Amounts reclassified from other accumulated comprehensive income (loss) before tax	[1]			1,600	(4,905)
Income tax (benefit)				(592)	1,812
Net current-period other comprehensive income (loss)				2,077	(13,990)
Accumulated other comprehensive income (loss)		(51,817)	(53,812)	(51,817)	(53,812)
Cash Flow Hedging Gain (Loss) [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Accumulated other comprehensive income (loss)				1,201	3,276
Other comprehensive income (loss) before reclassifications				(1,598)	3,666
Amounts reclassified from other accumulated comprehensive income (loss) before tax	[1]	0	2,300	(485)	(7,330)
Income tax (benefit)				179	2,708
Net current-period other comprehensive income (loss)				(1,904)	(956)
Accumulated other comprehensive income (loss)		(703)	2,320	(703)	2,320
Pension Liability [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Accumulated other comprehensive income (loss)				(25,982)	(30,760)
Other comprehensive income (loss) before reclassifications				0	0
Amounts reclassified from other accumulated comprehensive income (loss) before tax	[1]	700	800	2,085	2,425
Income tax (benefit)				(771)	(896)
Net current-period other comprehensive income (loss)				1,314	1,529
Accumulated other comprehensive income (loss)		(24,668)	(29,231)	(24,668)	(29,231)
Cumulative Translation Adjustment [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Accumulated other comprehensive income (loss)				(29,113)	(12,338)
Other comprehensive income (loss) before reclassifications				2,667	(14,563)
Amounts reclassified from other accumulated comprehensive income (loss) before tax	[1]			0	0
Income tax (benefit)				0	0
Net current-period other comprehensive income (loss)				2,667	(14,563)
Accumulated other comprehensive income (loss)		$ (26,446)	$ (26,901)	$ (26,446)	$ (26,901)

[1] The cash flow hedging gain (loss) and pension liability accumulated other comprehensive income (loss) components are included in sales or cost of sales and as a component of net periodic pension cost, respectively. The amounts recorded in the charts above are for the nine months ended September 30, 2016 and 2015. For the three months ended September 30, 2016, $0.0 million of the cash flow hedging gain and $0.7 million of the pension liability were reclassified from accumulated other comprehensive loss to the statement of income. For the three months ended September 30, 2015, $2.3 million of the cash flow hedging gain and $0.8 million of the pension liability were reclassified from accumulated other comprehensive loss to the statement of income. Refer to Note 5 and Note 10, respectively, for further details.