Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Domestic Plan [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	$ 828	$ 764
Expected return on plan assets	(1,039)	(956)
Recognized actuarial loss	130	234
Net periodic benefit cost	(81)	42
International [Member]
Components of net periodic benefit cost [Abstract]
Service cost	178	188
Interest cost	234	166
Recognized actuarial loss	40	72
Amortization of prior service cost/(benefit)	(2)	(2)
Net periodic benefit cost	450	424
SERP [Member]
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	$ 55	$ 54