Pension (Amounts Recognized in Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension asset	$ 0	$ 2,939
Pension liability (current portion)	3,282	2,185
Pension liability	45,206	43,555
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension asset	0	2,939
Pension liability (current portion)	3,282	2,185
Pension liability	45,206	43,555
Net accrued pension liability	$ (48,488)	$ (42,801)

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as current. Excludes other postretirement benefit plan.

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Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

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