Retirement Benefit Plans Periodic Benefit Cost (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 9	$ 11
Interest cost			954	848
Expected return on plan assets			(1,362)	(1,175)
Amortization of prior service cost			0	0
Amortization of net (gain)/loss			99	528
Net periodic benefit cost	(100)	71	(300)	212
Gradall Company Hourly Employees Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost			6	8
Interest cost			315	278
Expected return on plan assets			(477)	(412)
Amortization of prior service cost			0	0
Amortization of net (gain)/loss			54	214
Net periodic benefit cost			(102)	88
Gradall Company Hourly Employees Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost			3	3
Interest cost			639	570
Expected return on plan assets			(885)	(763)
Amortization of prior service cost			0	0
Amortization of net (gain)/loss			45	314
Net periodic benefit cost			$ (198)	$ 124