Retirement Benefit Plans (Obligation and Funded Status) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amounts recognized in the balance sheets consist of:
Noncurrent liabilities	$ (7,648,000)	$ (15,801,000)
U.S. Pension Plan
Change in benefit obligation
Benefit obligation at beginning of year	72,977,000	69,796,000
Interest cost	2,766,000	3,056,000	3,374,000
Actuarial (gain) loss	(4,488,000)	5,302,000
Benefits paid	(4,715,000)	(5,177,000)
Plan amendments	(1,441,000)	0
Foreign currency exchange rate changes	0	0
Benefit obligation at end of year	65,099,000	72,977,000	69,796,000
Accumulated benefit obligation at end of year	65,099,000	72,977,000
Change in plan assets
Fair value of plan assets at beginning of year	60,012,000	51,620,000
Actual return on plan assets	11,383,000	6,513,000
Employer contributions	490,000	7,056,000
Benefits paid	(4,715,000)	(5,177,000)
Foreign currency exchange rate changes	0	0
Fair value of plan assets at end of year	67,170,000	60,012,000	51,620,000
Funded status at end of year	2,071,000	(12,965,000)
Amounts recognized in the balance sheets consist of:
Noncurrent assets	8,005,000	20,000
Current liabilities	(1,138,000)	(477,000)
Noncurrent liabilities	(4,796,000)	(12,508,000)
Amount recognized in the balance sheets	2,071,000	(12,965,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Actuarial loss	18,861,000	32,187,000
Prior service credit	626,000	210,000
Deferred taxes	(7,854,000)	(13,216,000)
Accumulated other comprehensive income (loss)	11,633,000	19,181,000
Non-U.S. Pension Plan
Change in benefit obligation
Benefit obligation at beginning of year	5,212,000	4,877,000
Interest cost	197,000	208,000	229,000
Actuarial (gain) loss	(317,000)	167,000
Benefits paid	(160,000)	(148,000)
Plan amendments	0	0
Foreign currency exchange rate changes	(329,000)	108,000
Benefit obligation at end of year	4,603,000	5,212,000	4,877,000
Accumulated benefit obligation at end of year	4,603,000	5,212,000
Change in plan assets
Fair value of plan assets at beginning of year	4,961,000	4,597,000
Actual return on plan assets	719,000	410,000
Employer contributions	0	0
Benefits paid	(160,000)	(148,000)
Foreign currency exchange rate changes	(334,000)	102,000
Fair value of plan assets at end of year	5,186,000	4,961,000	4,597,000
Funded status at end of year	583,000	(251,000)
Amounts recognized in the balance sheets consist of:
Noncurrent assets	583,000	0
Current liabilities	0	0
Noncurrent liabilities	0	(251,000)
Amount recognized in the balance sheets	583,000	(251,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Actuarial loss	1,380,000	2,385,000
Prior service credit	0	0
Deferred taxes	(576,000)	(945,000)
Accumulated other comprehensive income (loss)	804,000	1,440,000
Other Postretirement Benefit Plans, Defined Benefit
Change in benefit obligation
Benefit obligation at beginning of year	3,283,000	3,131,000
Service cost	77,000	79,000	98,000
Interest cost	98,000	120,000	151,000
Actuarial (gain) loss	(16,000)	(295,000)
Benefits paid	(365,000)	(342,000)
Benefit obligation at end of year	3,109,000	3,283,000	3,131,000
Change in plan assets
Benefits paid	(365,000)	(342,000)
Funded status at end of year	(3,109,000)	(3,283,000)
Amounts recognized in the balance sheets consist of:
Current liabilities	(257,000)	(241,000)
Noncurrent liabilities	(2,852,000)	(3,042,000)
Amount recognized in the balance sheets	(3,109,000)	(3,283,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Actuarial loss	457,000	494,000
Prior service credit	(415,000)	(522,000)
Deferred taxes	674,000	700,000
Accumulated other comprehensive income (loss)	716,000	672,000
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year
Actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, before tax	100,000
Actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, net of tax (less than $0.1 million)	100,000
Prior service credit included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, before tax (less than $0.1 million)	(100,000)
Prior service credit included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, net of tax (less than $0.1 million)	100,000
Defined Benefit Pension Plans
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year
Actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, before tax	900,000
Actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, net of tax (less than $0.1 million)	(600,000)
Prior service credit included in accumulated other comprehensive income (loss) expected to be recognized in net periodic benefit cost in 2014, before tax (less than $0.1 million)	$ 100,000