Defined Benefit Pension Plans Schedule of Net Periodic Pension Benefit Costs (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
Schedule of Net Periodic Pension Benefit Costs [Line Items]
Service cost	$ 723	$ 1,026	$ 2,750	$ 3,018
Interest cost	871	791	2,661	2,377
Expected return on plan assets	(158)	(79)	(478)	(237)
Settlements and other	6	0	33	(814)
Amortization of actuarial net loss	118	249	363	746
Amortization of unrecognized prior service costs	17	17	53	51
Net periodic benefit cost	$ 1,577	$ 2,004	$ 5,382	$ 5,141