Defined Benefit Pension Plans Components of Pension Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs--increase in benefit obligation earned	$ 222	$ 185	$ 134
Interest cost on projected benefit obligation	1,515	1,657	1,671
Expected return on plan assets	(1,760)	(1,701)	(1,908)
Settlement loss	0	219	0
Amortization of net actuarial loss	1,388	1,041	535
Amortization of prior service cost	14	14	14
Amortization of transition asset	0	0	(68)
Net pension expense of defined benefit pension plans	1,379	1,415	378
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 1,467