Accumulated Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income or Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance					$ (11,450)		$ (57,808)
Other comprehensive income before reclassifications					(1,897)		(6,133)
Actuarial net gain (loss) incurred in the fiscal year	0		17,225		0		17,225
Amounts reclassified from accumulated other comprehensive income					472		2,753
Net current-period other comprehensive income					(1,425)		13,845
Ending balance	(12,875)		(43,963)		(12,875)		(43,963)
AOCI, Pension and other postretirement benefit plans, tax	2,759		11,613		2,759		11,613		2,900	22,371
AOCI, Cumulative changes in net gain (loss) from cash flow hedges, tax	90		87		90		87		110	127
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance					22,756		12,585
Other comprehensive income before reclassifications					(1,730)		(6,206)
Actuarial net gain (loss) incurred in the fiscal year					0		0
Amounts reclassified from accumulated other comprehensive income					0		0
Net current-period other comprehensive income					(1,730)		(6,206)
Ending balance	21,026		6,379		21,026		6,379
Funded status of pension plans and other postretirement benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance					(33,997)	[1]	(70,158)	[2]
Other comprehensive income before reclassifications					0	[1]	0	[2]
Actuarial net gain (loss) incurred in the fiscal year					0	[1]	17,225	[2]
Amounts reclassified from accumulated other comprehensive income					263	[1]	2,753	[2]
Net current-period other comprehensive income					263	[1]	19,978	[2]
Ending balance	(33,734)	[1]	(50,180)	[2]	(33,734)	[1]	(50,180)	[2]
Unrealized gain (loss) on derivative instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance					(209)	[3]	(235)	[4]
Other comprehensive income before reclassifications					(167)	[3]	73	[4]
Actuarial net gain (loss) incurred in the fiscal year					0	[3]	0	[4]
Amounts reclassified from accumulated other comprehensive income					209	[3]	0	[4]
Net current-period other comprehensive income					42	[3]	73	[4]
Ending balance	$ (167)	[3]	$ (162)	[4]	$ (167)	[3]	$ (162)	[4]

[1] Net of taxes of $2,759 and $2,900 for the periods ended June 30, 2014 and December 31, 2013, respectively.

[2] Net of taxes of $11,613 and $22,371 for the periods ended June 30, 2013 and December 31, 2012, respectively.

[3] Net of taxes of $90 and $110 for the periods ended June 30, 2014 and December 31, 2013, respectively.

[4] Net of taxes of $87 and $127 for the periods ended June 30, 2013 and December 31, 2012, respectively.