Pension and Other Postretirement Benefit Plans (Changes in the pension benefit obligation and plan assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in plan assets:
Funded status at end of year	$ 10,568	$ 6,939
Foreign Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	29,956	26,723
Service cost	831	671	793
Interest cost	504	651	717
Plan participant contributions	602	1,602
Benefits paid	(717)	(668)
Actuarial loss	(405)	1,659
Administrative expenses paid	978	0
Settlements	0	(1,417)
Effect of foreign currency translation	828	735
Projected benefit obligation at end of year	32,577	29,956	26,723
Changes in plan assets:
Fair value of plan assets at beginning of year	36,895	33,082
Actual return on plan assets	4,532	2,670
Company contributions	722	732	778
Plan participant contributions	602	1,602
Benefits paid	(717)	(668)
Settlements	0	(1,417)
Effect of foreign currency translation	1,111	894
Fair value of plan assets at end of year	43,145	36,895	33,082
Funded status at end of year	$ 10,568	$ 6,939