Retirement Benefit Plans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) Defined_Contribution_Plan Employee	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Feb. 03, 2006 Defined_Benefit_Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of non-contributory defined benefit pension plans | Defined_Benefit_Plan				2
Estimate of amount of unrecognized actuarial expense	$ 724,000
Other	194,000	$ 0
Accumulated other comprehensive income	$ (36,079,000)	(16,359,000)
Number of defined contribution plans | Defined_Contribution_Plan	3
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Annual contribution amount	$ 1,871,000	1,466,000	$ 1,331,000
Non-US
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of defined contribution plans | Defined_Contribution_Plan	3
Annual contribution amount	$ 864,000	806,000	$ 697,000
IAM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Annual contribution amount	$ 414,000	$ 378,000
Minimum | Non-US
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution percentage	3.00%
Maximum | Non-US
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution percentage	10.00%
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimate of amount of unrecognized actuarial expense	$ 311,000
SERP credited service period	10 years
Percentage of final 3 year average salary in which retirement benefit is based (percentage)	20.00%
Number of final years in which the Retirement Benefit is based	3 years
Retirement age	65 years
Period of time that vested retirement benefit will be paid after death or change in control	90 days
Years of monthly installments associated with SERP disability	15 years
SERP unfunded long-term liability	$ 1,964,301
Other	746,000
Accumulated other comprehensive income	1,218,301
Prior service cost that will be amortized over the remaining service periods	$ 1,964,301
Hourly Employees’ Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Former employees | Employee	332
Current employees | Employee	115
Employees’ Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Former employees | Employee	241
Current employees | Employee	80